1. Chapter 5 Review Mr. Hauser

2. Rules of the Game Working in TEAMS, you will be asked to answer questions from the assigned chapters. You have 30 seconds to write the answer down on the dry erase board. When the teacher says TIME’S UP, a team leader will stand up and show the teacher their answer.

3. Rules (Continued) Each correct answer is worth one point, unless otherwise stated. Teams can lose points for inappropriate conduct, comments, or cheating. The team with the most points at the end of the game wins!

4. Question 1 A force applied over a distance is called ____________.

5. Work

6. Question 2 What are the metric units used to measure Work? (Write out the word.)

7. Joules

8. Question 3 Energy of motion is called A)Potential B)Work C)Kinetic D)Chemical

9. Kinetic

10. Question 4 What are the metric units used to measure power? (Write out the word)

11. Watts

12. Question 5 A force of 45 Newtons acts on an object at an angle of 50 degrees above the horizontal pulling it 3 meters. How much work was done? (you must have the proper units with your answer)

13. 86.8 Joules

14. Question 6 The rate at which work is done is called ______.

15. Power

16. Question 7 Power is ________ related to time. A) directly B) inversely C) quadratically D) linearly

17. B) inversely

18. Question 8 When the force acting on an object is opposite the direction of motion of the object, _________ work is done.

19. negative

20. Question 9 _________ is defined as the ability to cause change or the ability to do work.

21. Energy

22. Question 10 If an object doubles its mass, its potential energy will ________. A) be halved B) double C) quadruple D) be reduced to one fourth

23. B) double

24. Question 11 If an object doubles its speed its kinetic energy will... A) be halved. B) double. C) quadruple. D) be reduced to one fourth.

25. C) quadruple

26. Question 12 List five types of non-mechanical energy we discussed in class.

27. Nuclear (atomic), Thermal, Chemical, Electrical, Light (radiant)

28. Question 13 This is considered “stored” energy or energy of position.

29. Potential energy

30. Question 14 A bird is flying above the ground. What type or types of mechanical energy does it have? (be as specific as possible)

31. Gravitational potential energy and kinetic energy

32. Question 15 How much horsepower do you have if your mass is 75 kg, and you can climb the steps that are 3.29 meters high in a time of 2.3 seconds?

33. 1.4 horsepower

34. Question 16 How much work is done to lift a 45 kg weight up a distance of 6.2 meters at a constant velocity?

35. 2,734 Joules

36. Question 17 How much work must be done by a force to accelerate a 1800kg car from 4.5 m/s to 27 m/s? (show units)

37. 638,000 Joules

38. Question 18 In the lab, we found the work done on the bow by pulling it back by finding the ________ under the graph of force vs. displacement.

39. area

40. Question 19 A rollercoaster starts from rest on top of its hill. It drops and moves through the bottom of the hill. What types of mechanical energy did the roller coaster have at the top and at the bottom? (Be as specific as possible)

41. Gravitational Potential Energy at the top and Kinetic Energy at the bottom

42. Question 20 Energy can neither be created nor destroyed but it can be converted from one form to another. This statement is called ______.

43. Law of Conservation of Energy

44. Question 21 Write the long form of the equation for the Law of Conservation of Energy.

45. KE f + PE f = KE i + Pe i + (W friction )

46. Question 22 All of the energy lost in a machine due to friction ends up in the form of ________.

47. Heat

48. Question 23 The energy that you use to move around all day long indirectly comes from what?

49. The sun

50. Question 24 When a spring is stretched four times further than its relaxed position, by what factor does its elastic potential energy increase?

51. 16 times

52. Question 25 A skier moves over top of a hill at 5.4 m/s and then drops 6.4 m down its surface. The hill is frictionless. What is the velocity of the skier at the bottom of the hill?

53. 12.4 m/s

54. A spring with with a spring constant of 890 N/m is compressed such that it has 6.4 Joules of elastic potential energy. How far was it compressed? Question 26

55. 0.12 meters

56. An 4.5 kg model airplane slows from 9.3 m/s to rest with a force of 22 N. How far did it travel during while slowing down? Question 27

57. 8.8 meters

58. FINAL QUESTION A roller coaster goes 14 m/s over its second hill, which is 22 meters high. It started from 3 m/s on top of its first hill. How high was the first hill?

59. 31.5 meters