1. Forces & Motion – Test 1 Review

2. A push or pull that acts on an object

3. force

4. A change in a moving object’s speed or direction

5. acceleration

6. A measure that does not change when an object’s location changes

7. Reference point

8. The measure of gravitational force exerted on an object

9. weight

10. Speed of an object in a particular direction

11. velocity

12. Distance an object moved over the time in which the motion took place

13. speed

14. The SI unit for force

15. newton

16. The combination of all forces acting on an object

17. Net force

18. To calculate an object’s acceleration, what formula would you use?

19. Acceleration = Vf – Vi time

20. What is the net force on an object when you combine a force of 10N north with a force of 5N south

21. 5 N north

22. Distance time

23. speed

24. What is the difference between speed and velocity?

25. Velocity is in a certain direction, speed is not

26. To produce a change in motion, a force must be ___________

27. unbalanced

28. When the net force is equal to 0N, the forces are _________

29. balanced

30. ____________ forces always cause a change in speed, direction, or both

31. unbalanced

32. Does a force applied always cause motion?

33. No – only if the force is unbalanced

34. Forces always come in ________

35. pairs

36. It takes 5 seconds for a dog to run 80 meters. What is it’s speed?

37. 16 m/s

38. A pig runs 84 meters in 7 seconds. What is it’s speed?

39. 12 m/s

40. A track star runs the 100 meter dash in 10 seconds. What is his speed?

41. 10 m/s

42. A crocodile moves 18 meters, and is traveling at 6 m/s. How long did it take him?

43. 3 seconds

44. A plane traveled for 2.5 hours at a velocity of 1200 km/hr. What distance did it travel?

45. 3000 km

46. A plane taking off reaches it’s takeoff velocity of 75m/s after 5 seconds. What is it’s acceleration?

47. 15 m/s/s

48. A ball rolling down a hill accelerates from 3 m/s to 34.5 m/s in 9 seconds. What is it’s acceleration?

49. 3.5 m/s/s

50. If a ball is dropped and falls for 10 seconds, how fast will it be going?

51. 98 m/s/s

52. A car rolls down a hill for 6 seconds – if the car was going 20 m/s at the beginning of the hill, what is it’s final velocity?

53. 78.5 m/s