Answers and help for 6 Weeks test. 2012

1. Fourth six weeks review

14. time (sec) Distance (m) 0 1 2 3 4 5

29. inelastic collisions

30. Inelastic collision

31. elastic collisions

32. Elastic collision

33. Two dimensional collision

38. Newton's Laws of Motion

42. Newtons’s 1 st Law and You Don’t let this be you. Wear seat belts. Because of inertia, objects (including you) resist changes in their motion. When the car going 80 km/hour is stopped by the brick wall, your body keeps moving at 80 m/hour.

43. Examples of Newton’s 1 st Law

47. 2 nd Law F = m x a

52. Examples of Newton’s 2nd Law

57. 3 rd Law Flying gracefully through the air, birds depend on Newton’s third law of motion. As the birds push down on the air with their wings, the air pushes their wings up and gives them lift.

59. Examples of Newton’s 3 rd Law