3. Tuesday, March 23 rd Agenda  Finish lab calculations  Chapter 8 Jeopardy Review  Homework: Finish Chapter 8 Study Guide Finish Chapter 8 Study Guide Chapter 8 crossword Puzzle Chapter 8 crossword Puzzle Chapter 8 Test/Study Guide Due Thursday, March 24 th !

4. Lab Calculations 1.To convert grams to kilograms: a.Divide your number of grams by 1,000 2.To convert centimeters to meters: a. Divide your number of centimeters by 100

5. Lab Calculations 3. To find the average time ball traveled (s): a.Time ball traveled for trial #1 Time ball traveled for trial #2 +Time ball traveled for trial #3 Answer b. Divide Answer by 3 to get average time (s)

6. Lab Calculations 4. To calculate the average speed of the ball (m/s): a.Average speed = length of ramp (m) average time ball traveled (s) average time ball traveled (s) 4.To calculate final speed (m/s): a. Multiply average speed by 2 to get final speed

7. Lab Calculations 5.To calculate final kinetic energy (J): a. Use the equation for kinetic energy KE = ½ X (mass of ball) X (final speed) 2 6.To calculate initial potential energy (J): a. Use the equation for potential energy PE = (mass of ball) X (9.8 m/s 2 ) X (ht of ramp)

8. Defending Your Conclusions  Use COMPLETE SENTENCES to answer the “Defending Your Conclusions” section of the lab.  Be sure to answer ALL PARTS of the questions, not just a Yes or No…

9. Jeopardy Teams 1B Team #1: Team #2: Team #3: Team #4: Team #5:

10. Chapter 8 Work & Energy

11. THE RULES: There will be 5 teams The host’s decisions are final Each member of the winning team will receive $1 mole money

12. And now…here is the host of Jeopardy… Mrs. Elfline

13. Let’s Get Ready to play… Today’s Categories are:

14. Definitions

15. Simple Machines Simple Machines

16. Critical Thinking Critical Thinking

17. Calculations

18. Word Puzzles Word Puzzles

19. $100 $200 $300 $400 $500 Definitions $100 $200 $300 $400 $500 Simple Machines $100 $200 $300 $400 $500 Critical Thinking $100 $200 $300 $400 $500 Calculations $100 $200 $300 $400 $500 Word Puzzles FJ

20. A quantity defined as force X distance Answer…

21. Work 100

22. Power is calculated by dividing work by Answer…

23. Time 200

24. The ability to do work defines Answer…

25. Energy 300

26. The sum of the kinetic and potential energy of large-scale objects in a system is called Answer…

27. Mechanical Energy 400

28. The ratio of useful work output to work input is a measure of The ratio of useful work output to work input is a measure of Answer…

29. Efficiency 500

30. Answer… What are the 2 families of simple machines?

31. 100 Lever and Inclined Plane

32. Answer… Levers are divided into how many classes based on the location of the fulcrum?

33. 3 200

34. Where is the fulcrum in a 1 st class lever? Answer…

35. In the middle of the rigid arm. 300

36. What is the mechanical advantage of a single, fixed pulley? Answer…

37. 1 400

38. What class of lever is a bicep muscle? Answer…

39. 3 rd class 500

40. A boy pushes on a parked car with a force of 200 N but the car does not move. How much work does the boy do on the car? Answer…

41. 0 (No work is done unless the object moves) 100

42. A quantity that measures how much a machine multiplies force or distance is called Answer…

43. Mechanical Advantage 200

44. What is the ability to do work called? Answer…

45. Energy 300

46. Gravitational potential energy depends on the: a. Mass of the object b. Height of the object c. Acceleration due to gravity d. All of the above Answer…

47. d. All of the above 400

48. What is the primary source of the sun’s energy? Answer…

49. Nuclear Fusion 500

50. A boy uses a force of 65 N when he lifts a box 1.2 meters. How much work does he do? Answer…

51. 78 J 100

52. How much power is needed to do 180 J of work in 2.4 seconds? Answer…

53. 75 watts 200

54. What is the gravitational potential energy of a 55 kg box that is 8.0 meters above the ground? Answer…

55. 4,312 J 300

56. A ball has a mass of 5 kg and is thrown with a speed of 2 m/s. What is the kinetic energy? Answer…

57. 10 J 400

58. What is the efficiency of a ramp with a work input of 240 J and a useful work output of 180 J? Answer…

59. 75 % 500

60. Answer…

61. I’ll Get Over It 100

62. Answer…

63. Square Dance 200

64. “ Answer…

65. Scrambled Eggs 300

66. “ Answer…

67. What’s Up With That? 400

68. “ Answer…

69. Some Are Over Worked and Under Paid 500

70. Daily Double How much do you want to wager? Daily Double Daily Double

71. FINAL JEOPARDY

72. CATEGORY: Word Puzzles How much do you want to wager? Proceed…

74. A Step Backwards Proceed…

75. Thanks for PLAYING!