2. Welcome to Work/Energy/Power JEOPARDY KEYBOARDING

3. Final Jeopardy Question Work Energy 100 Work energy Theorem 500 400 300 200 100 200 300 400 500 Power Conservation of Mechanical energy

4. What is the Unit for Work? Back Work 100 pts

5. The Joule Back Work 100 pts Answer

6. The work required to lift a 500N object up a height of 40 m? Back Work 200 pts

7. Back Work 200 pts 20,000J

8. A person applies a force of 50 N to do 600J of Work. How far has the person moved the object? Back Work 300 pts

9. Back Work 300 pts 12 m

10. Back Santa pulls a load of toys with an applied force of 4000N at an angle of 60 degrees. If there is 1000N of resistance what is the total work exerted on the toys is Santa pulls them 200m? Work 400pts

11. 2.0 X 5 J Back Work 400 pts Answer

12. Jack the body builder decides to bench press 550N. It takes him.3 s to lift the 550N weight a distance of.5m. He holds it in place for 4s and then gently for 3s lets the bar back down to its starting position. a.How much of the time was doing positive work b.How much of the time was doing negative work c.How much of the time was spent doing no work d.What was the total work done Back Work 500 pts

13. Back Work 500pts Answer a..3s b. 3s c.4s d.Zero

14. What is the unit for energy? Back Energy 100pts

15. The Joule Back Energy 100 pts

16. Back Energy 200 pts The type of energy resulting from an objects position

17. Back Energy 200pts Answer What is potential energy?

18. The type of energy due to an objects motion Back Energy 300pts

19. Back Energy 300 pts What is kinetic energy?

20. Back Collisions in which kinetic energy is conserved? Energy 400 pts

21. What are elastic collisions? Back Energy 400 pts Answer

22. A.05 kg bullet strikes a block of wood with an initial velocity of 4m/s. What initial kinetic energy does the bullet have as it enters the wood. Back Energy 500 pts

23. Back Energy 500 pts Answer.4J

24. The unit for power Back Power 100 pts

25. What is a Watt? Back Solar Cycle 100 pts Answer

26. Back How much power does it take a 600N person to climb to a height of 4m in 2min? Star Cycle 200pts

27. Back Two Watts Star Cycle 200pts Answer

28. How much energy does a 500 kwatt bulb use in one hour? Back Power 300pts

29. Back Power 300pts Answer 500 kwatt hr

30. Back Your electric bill this month is 30 dollars, and you Pay $.03 per kwatt hour. How much energy did you use? What was the average power usage?

31. 100 kwatt hr,.138kwatts Back

32. How much power is required to keep an 600N object moving at a constant 3m/s if the coefficient of friction is.5?

33. 900 watts or.9 kwatts Back

34. Energy is never created nor destroyed just converted from one form to another Back

35. What is conservation of energy? Back

36. A trapeze artist swings from the top of a platform to the other side, Describe the change in mechanical energy at the following positions a.Top of platform b.Bottom of swing c.Top of final platform Back

37. All potential kinetic and potential All potential

38. What is the final speed of 5000 kg rollercoaster if it starts from rest at a height of 500m and ends at a height of 300m? Back

39. 62.6 m/s Back

40. A 40 kg monkey jumps up a tree with a velocity of 4m/s. How high will the monkey jump?

41. .4 m Back

42. What type of forces conserve mechanical energy?

43. Back Conservative forces, forces that do not loose heat.

44. How much energy will you get if you do 400 J of Work Back

45. 400 J Back

46. How far will a 40kg object moving at 3m/s travel if a 20N force acts on it? Back

47. 9m Back

48. Work equals the change in kinetic energy Back

49. What is the work energy theorem? Back

50. A bow is pulled back.3m with an average force of 200N what is the energy stored in the bow?

51. 60 joules Back

52. An archer after providing 450J of work on a bow releases it. What is the velocity of the arrow if its mass is 1kg? Back

53. 30 m/s

54. When was the internet developed? Back

55. 1960’s Back