2. A. Power B. Watt C. Machine D. Force

3. A. Power B. Watt C. Machine D. Force

4. A. Power B. Work Input C. Work Output D. Lever

5. A. Power B. Work Input C. Work Output D. Lever

6. A. Power B. Work input C. Work output D. Lever

7. A. Power B. Work input C. Work output D. Lever

8. A. Power B. Output force C. Mechanical efficiency D. Mechanical advantage

9. A. Power B. Output force C. Mechanical efficiency D. Mechanical advantage

10. a. Mechanical efficiency b. Force c. Mechanical advantage d. Power

11. a. Mechanical efficiency b. Force c. Mechanical advantage d. Power

12. A. Friction B. Input force C. Output force D. Power

13. A. Friction B. Input force C. Output force D. Power

14. A. A school crossing guard raises a stop sign that weighs 10 N. B. A student walks while wearing a backpack that weighs 15 N. C. A man exerts 350 N force on a rope attached to a house. D. A worker holds a box 1 m off the floor.

15. A. A school crossing guard raises a stop sign that weighs 10 N. B. A student walks while wearing a backpack that weighs 15 N. C. A man exerts 350 N force on a rope attached to a house. D. A worker holds a box 1 m off the floor.

16. A. The shape of the weights B. How high the barbell is being lifted C. The strength of the person doing the lifting D. The amount of output force

17. A. The shape of the weights B. How high the barbell is being lifted C. The strength of the person doing the lifting D. The amount of output force

18. A. The object is moved over a shorter distance. B. The ramp increases the amount of work you do. C. Less force is needed to move the object over a longer distance. D. More force is needed to move the object over a longer distance.

19. A. The object is moved over a shorter distance. B. The ramp increases the amount of work you do. C. Less force is needed to move the object over a longer distance. D. More force is needed to move the object over a longer distance.

20. A. Work input B. Work output C. Power D. Efficiency

21. A. Work input B. Work output C. Power D. Efficiency

22. A. Which is bigger B. Which has a larger input force C. Which has a larger output force D. Which makes work easier

23. A. Which is bigger B. Which has a larger input force C. Which has a larger output force D. Which makes work easier

24. A. It is used to get the machine started. B. It is used to overcome the friction created by the machine C. It is used to keep the machine running D. There isn’t enough power present

25. A. It is used to get the machine started. B. It is used to overcome the friction created by the machine C. It is used to keep the machine running D. There isn’t enough power present

26. A. Knife B. Plow C. Chisel D. Ramp

27. A. Knife B. Plow C. Chisel D. Ramp

28. A. A circular distance B. A rectangular distance C. An inclined plane D. A spiral

29. A. A circular distance B. A rectangular distance C. An inclined plane D. A spiral

30. A. 100 J B. 500 J C. 5 J D. 500 N

31. A. 100 J B. 500 J C. 5 J D. 500 N

32. A. First-class lever B. Block and tackle pulley C. Wheel and axel D. Screw

33. A. First-class lever B. Block and tackle pulley C. Wheel and axel D. Screw

34. A. The speed of a force B. The direction of a force C. The size of a force D. The timing of a force

35. A. The speed of a force B. The direction of a force C. The size of a force D. The timing of a force

36. A. It must increase B. It must decrease C. It must stay the same D. It must double

37. A. It must increase B. It must decrease C. It must stay the same D. It must double

38. A. Inclined plane B. Wheel and axle C. Lever D. Pulley

39. A. Inclined plane B. Wheel and axle C. Lever D. Pulley

40. A. Power B. Energy C. Work D. Joule

41. A. Power B. Energy C. Work D. Joule

42. A. Simple machine B. Lever C. Pulley D. Compound machine

43. A. Simple machine B. Lever C. Pulley D. Compound machine

44. A. Lever B. Pulley C. Wheel and axle D. Wedge

45. A. Lever B. Pulley C. Wheel and axle D. Wedge

46. A. Forced B. Work C. Moving D. Kinetic

47. A. Forced B. Work C. Moving D. Kinetic

48. A. The input force B. The output force C. The work D. The power

49. A. The input force B. The output force C. The work D. The power

50.  Pulley  Wheel and axle  Lever  Screw

51.  Pulley  Wheel and axle  Lever  Screw

52. A. Wheel and axle B. Pulley C. Lever D. Inclined plane

53. A. Wheel and axle B. Pulley C. Lever D. Inclined plane

54. A. Mechanical efficiency B. Mechanical advantage C. Work D. Power

55. A. Mechanical efficiency B. Mechanical advantage C. Work D. Power