2. Jeopardy Newton’s 1 st Law Newton’s 2 nd Law Newton’s 3 rd Law VocabularyFriction and More 200 400 600 800 1000 400 600 800 1000 Final Jeopardy

3. What is the definition of Newton’s 1 st Law of motion? 2

4. 3 An object at rest will stay at rest and an object in motion will stay in motion unless acted on by an outside unbalanced force.

5. 4 What is another name for Newton’s first law?

6. 5 The Law of Inertia

7. 6 When you are riding the bus and the bus stops short, your body moves forward, Why?

8. 7 Because no outside unbalanced force acted on you, so you continue moving in a straight line at a constant speed

9. 8 How is inertia measured?

10. 9 Mass

11. 10 Explain the difference in inertia in a bowling ball and a softball.

12. 11 Bowling ball has more mass, therefore more inertia, it is harder to change its motion.

13. 12 What is the formula for Newton’s 2 nd Law of Motion?

14. 13 F net = ma

15. 14 Is acceleration greater with an empty cart of groceries or a full cart?

16. 15 Empty cart

17. 16 Give an example of Newton’s 2 nd Law and how it relates force, mass, and acceleration.

18. 17 Many answers: for example, it would be easier to make an empty baby stroller accelerate than a stroller full of bricks because it has less mass. You would not need to use as much force to move the empty stroller.

19. 18 As velocity increases, air resistance_______. As size/shape increases, air resistance_______.

20. 19Increases

21. 20 What is the acceleration of a 3kg mass if a force of 14.4 N is used to move the mass? (1 N = 1 kg*m/s 2 ) Need paper!

22. 21 4.8 m/s 2

23. 22 What is the definition of Newton’s 3 rd law?

24. 23 For every action there is an equal and opposite reaction

25. 24 When a rocket takes off, why does the rocket move but the earth does not move?

26. 25 Because the earth has more mass

27. 26 Give an example of Newton’s 3 rd Law

28. 27 Many answers: bumper cars, a rocket launching, birds flying, walking, etc….

29. 28 Identify the action and reaction forces when a hammer hits a nail.

30. 29 Action force is the hammer pushing down the nail, reaction force is the nail pushing up on the hammer, causing it to stop.

31. 30 You and a small child are on skates and give each other a push. The mass of the child is half your mass, who has the greater acceleration?

32. 31 The child will have twice the acceleration you have.

33. 32 A push or a pull

34. 33 A force

35. 34 The combination of all forces acting on an object.

36. 35 Net force

37. 36 Forces of equal strength but in opposite directions exerted on an object

38. 37 Balanced forces

39. 38 Net forces acting on an object

40. 39 Unbalanced forces

41. 40 The force that acts to resist sliding between two object.

42. 41 friction

43. 42 keeps an object at rest; caused by attraction between the atoms on the 2 surfaces in contact

44. 43 Static friction

45. 44 Explain sliding friction and what causes it.

46. 45 slows down an object that slides; caused by microscopic roughness

47. 46 Why don’t we feel the Sun’s gravitational force?

48. 47 Because gravitational force weakens with distance.

49. 40 The force that balances the gravity/weight pushing down on all object.

50. 49 Normal force

51. 50 According to Newton’s 1 st law, objects in motion continue in a straight line at a constant speed. Why do most objects eventually come to a stop?

52. 51 Because of outside forces like friction, gravity, and air resistance

53. 52 Is the force on the box balanced? Explain. 3 N 5 N 2 N

54. 53 No, the net force is pushing to the left with a strength of 3 N.