Mid Year Review

1. Mid Year Review The following presentation will help you to prepare for our midyear. Viewing this presentation will help you study in the form of flashcards, just like we did in class. Each question is marked with a and each answer is marked with a . As you read each question, the answer will follow, quiz yourself to study!

2. What is a force that opposes motion between two surfaces?

3. Friction

4. What factors determine speed?

5. Distance and Time

6. As the distance between two objects increases, what happens to the force of gravity between them?

7. The gravity between the two objects decreases

8. What is an object that appears to stay in place?

9. A reference point

10. To calculate an object’s acceleration what do you need to know?

11. Final velocity, starting velocity & time it takes to change velocity

12. What is the difference between speed and velocity?

13. Velocity has a direction while speed does not

14. When something changes position what is it doing?

15. Moving

16. What is the SI unit for speed?

17. meters/second(distance/time)

18. How does mass affect the amount of gravity exerted on two objects?

19. The more mass objects have, the greater the gravity between them

20. In what direction is a projectile accelerated?

21. horizontally & vertically

22. You are exerting a force on the chair you are sitting on, is the chair exerting an equal, greater or smaller amount of force on you?

23. The force that the chair exerts is equal to the force you are exerting on it.

24. When a bowling ball collides with a bowling pin, what happens to the momentum of the ball?

25. The momentum of the bowling ball decreases, as some of the momentum is transferred to the bowling pin

26. If a moving boxcar gently collides with a boxcar at rest and the two boxcars move together, what will their combined momentum be?

27. The momentum of the boxcars will be equal to the momentum of the boxcar that hit the car at rest

28. If an action force is a cue ball hitting a billiard ball, what is the reaction force?

29. The force exerted on the cue ball by the billiard ball

30. If a tennis ball, a solid rubber ball and a solid steel ball were dropped at the same time from the same height, which would hit the ground first? (assume there is no air resistance)

31. All three objects will land at the same time(they are all in free fall)

32. Why does a crumpled piece of paper hit the ground before a flat sheet of paper?

33. The crumpled piece of paper experiences less air resistance than the flat sheet of paper

34. According to Newton’s First Law of Motion, what will happen to a moving object that is not acted on by an unbalanced force?

35. The moving object will continue moving

36. What makes it harder to change the motion of a watermelon than that of an apple?

37. The watermelon has more mass

38. How does air resistance affect the speed of a falling object?

39. Air resistance decreases the speed of falling objects

40. Identify the bridge pictured below

41. Suspension Bridge

42. Identify the bridge pictured below

43. Cable Stayed Bridge

44. Identify the bridge pictured below

45. Arch Bridge

46. Identify the bridge pictured below

47. Truss Bridge

48. Identify the bridge pictured below

49. Beam bridge

50. A force of attraction between objects due to their masses