3. THIS IS

4. 100 200 300 400 500 Work Efficient Machines Machines Simple Solutions Levers CRCT Review

5. What must occur every time for work to be exerted? A 100

6. 1.A force must be applied 2.An object must move in the same direction as the force A 100

7. What unit is used to measure force? What unit is used to measure work? A 200

8. Newtons (N) Joules (J) A 200

9. What is the formula for work? A 300

10. Work = force x distance (W = f x d) A 300

11. If you lift your science book up off the floor, are you doing work? Why/why not? A 400

12. Yes, because you are lifting your books upward, and the books are moving upward also. A 400

13. A 500 You pick your cell phone up off the counter and talk into it as you walk across the room. When you finish talking, you place it back on the counter and slide it away from the edge. When are you doing work on the cell phone?

14. 1.Picking up the cell phone 2.Placing it down on the counter 3.Pushing it away from the edge A 500

15. You exert 20 N to push a desk 10 m. B 100

16. 200 J B 100

17. You move a wheelbarrow 50 m by exerting 100 N. B 200

18. 5,000 J B 200

19. What is the MA of a machine that has an output of 250 J if you have an input of 10 J. B 300

20. 25 B 300

21. You push a car 0 m with 200 N B 400

22. No work is being done because the car didn’t move

23. You carry your cat 50 m with 100 N B 500

24. No work is being done, you are holding the cat up and moving it forward B 500

25. What is a term that means the same thing as input force? C 100

26. Effort C 100

27. OL-What is the ideal mechanical efficiency of a machine? AD- How do you calculate the mechanical efficiency of a machine? C 200

28. OL-100% AD- output force input force C 200 x 100%

29. How do you find the MA of a machine? C 300

30. Output force Input force C 300

31. C 400 What are the 3 ways a machine can help you do work?

32. 1.Multiply distance 2.Multiply force 3.Change direction C 400

33. C 500 What is the MA of a machine that multiplies force?

34. Greater than 1

35. An inclined plane that moves is called? D 100

36. A wedge D 100

37. An inclined plane wrapped around a cylinder is called? D 200

38. A screw D 200

39. A machine that uses 2 or more simple machines is called? D 300

40. A compound (or complex) machine D 300

41. Which type of simple machines best represent these parts of your body? 1.Muscles and bones 2.Teeth D 400

42. 1.Levers 2.Wedges D 400

43. Why would you increase the length and thinness of a wedge? D 500

44. To create a greater MA D 500

45. The fixed point a lever pivots around is called? E 100

46. The fulcrum E 100

47. The weight the lever lifts is called? E 200

48. The resistance E 200

49. What is always located in the middle of a 2nd class levers? E 300

50. The resistance E 300

51. What class of lever does a bottle opener belong to? E 400

52. 2 nd class E 400

53. What class of lever do pliers belong to? E 500

54. 1 st class E 500

55. From an element’s location on the periodic table, what can you predict? F 100

56. An element’s properties F 100

57. What is used to measure how much matter an object contains? F 200

58. Mass F 200

59. When elements are in the same column on the periodic table, they are in the same _________. F 300

60. Family F 300

61. How are atoms and elements related? F 400

62. Every element has it’s own specific type of atom. F 400

63. In order for a skater to not be accelerating, what would they need to be doing? F 500

64. Skating in a straight line at a constant speed. F 500

65. The Final Jeopardy Category is: Types of Machines Please record your wager. Click on screen to begin

66. OL- Explain why wedges and screws are actually types of inclined planes. AD- If constructing a lever with the highest MA possible, where should the effort, resistance, and fulcrum be located? Using the picture below, which machines multiply the input force? Click on screen to continue

68. Thank You for Playing Jeopardy! Game Designed By C. Harr-MAIT