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2. Category 1 questions follow

3. What type of force involves two objects touching?
Category 1 10

4. contact force
Category 1 10

5. What will happen to an object at rest if the net force acting on it is zero?
Category 1 20

6. It will stay at rest.
Category 1 20

7. The formula acceleration = net force/mass applies to…
Category 1 30

8. Newton’s Second Law of Motion
Category 1 30

9. An astronaut’s ______________ changes as he or she goes from Earth into space.
Category 1 40

10. weight
Category 1 40

11. 50 The tendency of an object to resist a change in motion is…
Category 1 50

12. inertia
Category 1 50

13. Category 2 questions follow

14. A push or pull on an object is a…
Category 2 10

15. force
Category 2 10

16. The amount of matter in an object is …20

17. mass
Category 2 20

18. 30 The measure of how hard it is to stop a moving object is…
Category 2 30

19. momentum
Category 2 30

20. The forces that two objects apply on each other is…
Category 2 40

21. force pair
Category 2 40

22. ________________ acts perpendicular to the direction of motion when an object moves in a circle.
Category 2 50

23. centripetal force
Category 2 50

24. Category 3 questions follow

25. If the net force on an object is zero, then an object at rest will remain at rest and a moving object will continue moving in a straight line at a constant speed.
Which of Newton’s law is this?
Category 3 10

26. Newton’s First Law
Category 3 10

27. What is the law of universal gravitation?
Category 3 20

28. 20 All objects are attracted to each other by a gravitational force.
Category 3 20

29. How does friction affect an object in motion?
Category 3 30

30. The force of friction opposes movement and generally works to slow down the motion of an object.
Category 3 30

31. How do balanced forces affect an object that is moving?
Category 3 40

32. Balanced forces do not affect the motion of the object
Balanced forces do not affect the motion of the object. If the object is moving it will continue moving at the same speed and in the same direction.
Category 3 40

33. 50 How do balanced forces affect an object that is not moving?
Category 3 50

34. If an object is not moving, it would remain at rest.
Category 3 50

35. Category 4 questions follow

36. How does centripetal force act on an object that is moving in a circle?
Category 4 10

37. It acts in a motion perpendicular to the motion of the object moving in a circle.
Category 4 10

38. What is an example of a force pair?
Category 4 20

39. (Any example in which two objects exert force on each other – equal in strength, opposite in direction)
Category 4 20

40. What is the law of conservation of momentum?
Category 4 30

41. The total momentum of a group of objects remains the same unless outside forces act on the objects.
Category 4 30

42. Give an example of the law of conservation of momentum.
Category 4 40

43. (Any example of an object maintaining it’s momentum until an outside force acts on it and causes it to change speed, direction, or both.
Category 4 40

44. The acceleration of an object is equal to the net force exerted on the object divided by the object’s mass.
Which of Newton’s Laws is this?
Category 4 50

45. Newton’s Second Law of Motion
Category 4 50

46. Category 5 questions follow

47. When one object exerts a force on a second object, the second object exerts an equal force in the opposite direction.
Which of Newton’s Laws is this?
Category 5 10

48. Newton’s Third Law of Motion
Category 5 10

49. What is the net force of 150N and 275N
Category 5 20

50. 125 N
Category 5 20

51. Newton’s second law allows scientists to calculate…
Category 5 30

52. acceleration
Category 5 30

53. 40 How are mass and weight related? Are they… the same? not related?
proportional to each other?
Category 5 40

54. They are proportional to each other
Category 5 40

55. What is an example of Newton’s Third Law of Motion?
Category 5 50

56. (Any example that includes an object moving at a specific speed until it is acted upon by an outside force that causes it to change speed, direction, or both.)
Category 5 50