Keep trying until you find the correct answer.

1. An object is being pushed along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

2. An object is being pushed along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

3. An object is being pushed along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

4. An object is being pushed along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

5. An object is being pushed along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

6. An object is being pushed along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

7. An object is being pushed along a flat ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

8. An object is being pushed along a flat ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    To the right ( → )
   2.   ?    To the left ( ← )
   3.   ?    Either direction is consistent.

9. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
   
   

   1.   ?    Up the incline
   2.   ?    Down the incline
   3.   ?    Either direction is consistent.

10. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

11. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

12. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

13. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

14. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

15. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

16. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

17. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

18. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

19. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

20. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

21. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

22. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

23. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

24. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

25. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

26. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

27. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

28. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

29. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

30. An object is being pushed along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

31. An object is being pushed along a tilted ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

32. An object is being pushed along a tilted ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

33. An object is being pushed along a tilted ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

34. An object is being pushed along a tilted ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

35. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

36. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

37. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

38. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

39. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

40. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

41. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

42. An object is being pushed along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the linear acceleration a are shown. The applied force F acts through the centre of the object. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

43. An object is rolling without slipping on an incline as shown in the diagram below. The linear acceleration a is shown. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

44. An object is rolling without slipping on an incline as shown in the diagram below. The linear acceleration a is shown. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

45. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

46. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

47. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

48. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

49. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

50. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

51. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

52. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

53. A yo-yo is being pulled along a flat ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

54. A yo-yo is being pulled along a flat ceiling so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    To the right ( → )
    2.   ?    To the left ( ← )
    3.   ?    Either direction is consistent.

55. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

56. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

57. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

58. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

59. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down he incline
    3.   ?    Either direction is consistent.

60. A yo-yo is being pulled along a flat surface so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down he incline
    3.   ?    Either direction is consistent.

61. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

62. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

63. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

64. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

65. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

66. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

67. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

68. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

69. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

70. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

71. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

72. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

73. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

74. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

75. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

76. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

77. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

78. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

79. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

80. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

81. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

82. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

83. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

84. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

85. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

86. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

87. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

88. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

89. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

90. A yo-yo is being pulled along an incline so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Up the incline
    2.   ?    Down the incline
    3.   ?    Either direction is consistent.

91. A yo-yo is being pulled along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downwardt ( ↓ )
    3.   ?    Either direction is consistent.

92. A yo-yo is being pulled along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

93. A yo-yo is being pulled along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downwardt ( ↓ )
    3.   ?    Either direction is consistent.

94. A yo-yo is being pulled along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downwardt ( ↓ )
    3.   ?    Either direction is consistent.

95. A yo-yo is being pulled along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downward ( ↓ )
    3.   ?    Either direction is consistent.

96. A yo-yo is being pulled along a vertical wall so that it rolls without slipping as shown in the diagram below. The applied force F and the observed linear acceleration a are shown. The applied force F has an unknown magnitude but acts tangentially to the edge of the yo-yo's central cylinder. In which direction must static friction act if the diagram is to be consistent with rolling without slipping and Newton's Laws?
    
    

    1.   ?    Upward ( ↑ )
    2.   ?    Downwardt ( ↓ )
    3.   ?    Either direction is consistent.