Newton's laws of motion and the law of universal gravitation are explained. The key concepts covered include: 1) An object's mass determines how difficult it is to accelerate or change its motion, with more mass requiring greater force. 2) Force, mass, and acceleration are directly related as described by Newton's second law, F=ma. 3) For every action there is an equal and opposite reaction, as stated in Newton's third law.

1. 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 20 pt 30 pt 40pt 50 pt 10 pt 10 pt Newton’s 1 st law Newton’s 2 nd law Newton’s 3rd law Law of Gravity Words of Motion F J

2. An object will be harder to move if it has more of this. 2

3. What is mass. (or matter) 3

4. A moving object tends to stay in motion unless this acts on . 4

5. What is an unbalanced force? 5

6. This is the kind of forces acting on a book not moving on a desk. 6

7. What are balanced forces? 7

8. This force slows down many objects on earth. 8

9. What is friction? 9

10. Newton’s 1 st law can be summed up in this one word. 10

11. What is inertia? 11

12. This will happen to an object that has a force applied to it. 12

13. What is accelerate? 13

14. If you increase the force on a moving object this will happen to the acceleration. 14

15. What is it will increase? 15

16. If you increase the mass of an object, this will happen to the acceleration. 16

17. What is it will decrease? 17

18. These 2 things determine the acceleration of any object. 18

19. What are mass and force? 19

20. This equation explains the relationship between force, mass, and acceleration. 20

21. What is F = m X a ? (Or any member of the fact family.) 21

22. 22 If you throw a heavy ball while you are wearing skates, this will probably happen.

23. 23 What is you’ll be pushed back by the ball?

24. 24 Every action has an equal and opposite one of these.

25. 25 What is reaction?

26. 26 When a balloon flies across a room because of air pressure, the push of air is this.

27. What is the action? 27

28. 28 When the thrust of a rocket pushes it into space, the moving rocket is this.

29. 29 What is the reaction?

30. 30 This is the reaction when rowers use their oars to push water.

31. What is the boat moves forward? 31

32. A feather will fall more slowly than a rock because of this. 32

33. What is air resistance? 33

34. 34 This scientist found that without air resistance, heavy and light objects fall at the same rate.

35. Who is Galileo? 35

36. As an object falls, it’s velocity does this. 36

37. What is it increases? (or accelerates.) 37

38. Objects close to earth accelerate at this rate as they fall. 38

39. What is 9.8 m/s 2 ? (meters per second, each second) 39

40. The moon stays in orbit because of these two forces. 40

41. What are gravity and inertia? 41

42. Objects with mass pull each other because of this. 42

43. What is gravity? 43

44. How fast an object changes position. 44

45. What is speed? 45

46. The speed and direction of a moving object . 46

47. What is velocity? 47

48. A push or a pull that can be either balanced or unbalanced. 48

49. What is a force? 49

50. It measures how much gravity pulls an object . 50

51. What is weight? 51

52. Final Jeopardy 52

53. FINAL JEOPARDY This ancient scientist thought heavy objects fall faster than light ones. 53

54. Who is Aristotle? 54

55. 55