2. Jeopardy Simple Machines IMA AMA Efficiency Physics is Phun 5 10 15 20 25 5555 10 15 20 25 Final Jeopardy

3. 5 pt Question from H1 Name four of the 6 simple machines

4. 5 pt Answer from H1 Name four of the 6 simple machines. A) lever B) pulley C) inclined plane D) screw E) wedge F) wheel & axle

5. 10 pt Question from H1 Name the two fundamental simple machines that the other four could be said to be of that type. A)lever B)pulley C)inclined plane D)wedge E)screw F) wheel & axle

6. 10 pt Answer from H1 Name the two fundamental simple machines that the other four could be said to be of that type. A)lever B)pulley C)inclined plane D)wedge E)screw F) wheel & axle

7. 15 pt Question from H1 Name all 6 simple machines.

8. 15 pt Answer from H1 Name all 6 simple machines A)pulley B)inclined plane C)wedge D) lever E)screw F) wheel & axle

9. 20 pt Question from H1 Name all 6 simple machines.

10. 20 pt Answer from H1 Name all 6 simple machines. A)lever B)pulley C)inclined plane D)wedge E)screw F) wheel & axle

11. 25 pt Question from H1 Name the 3 simple machines for which you need to be able to calculate the IMA. A)lever B)pulley C)inclined plane D)wedge E)screw F) wheel & axle

12. 25 pt Answer from H1 Name the 3 simple machines for which you need to be able to calculate the IMA. A)lever B)pulley C)inclined plane D)wedge E)screw F) wheel & axle

13. 5 pt question from H2 What does IMA stand for? A)Individual mechanical advantage C) B) Idiotic Machine Alliance C) Ideal Mechanical Advantage D) Ideal Mechanical Energy

14. 5 pt answer from H2 What does IMA stand for? A)Individual mechanical advantage C) Ideal Mechanical Advantage B) Idiotic Machine Alliance C) Ideal Mechanical Advantage D) Ideal Mechanical Energy

15. 10 pt question from H2 What is the IMA of an inclined plane which is 12m long (ramp), 4 m high and has a base which is 10 m long? A) 3 B) 3 m C) 2.5 D) 2.5 J

16. 10 pt answer from H2 What is the IMA of an inclined plane which is 12m long (ramp), 4 m high and has a base which is 10 m long? 3 A) 3 B) 3 m C) 2.5 D) 2.5 J

17. 15 pt question from H2 What is the IMA of a lever which is 12m long (from tip to tip), 4 m from fulcrum to load and a distance of 8 m from fulcrum to effort (where you push)? A) 3 B) 3 m C) 2 D) 2 J

18. 15 pt answer from H2 What is the IMA of a lever which is 12m long (from tip to tip), 4 m from fulcrum to load and a distance of 8 m from fulcrum to effort (where you push)? A) 3 B) 3 m 2 C) 2 D) 2 J

19. 20 pt question from H2 What determines the IMA of a pulley? A)the input and output forces B)the total length of the rope used with it C)the number of ropes as counted between the pulleys D)the number of support ropes as counted between the pulleys E)the total number of pulleys

20. 20 pt answer from H2 What determines the IMA of a pulley? A)the input and output forces B)the total length of the rope used with it C)the number of ropes as counted between the pulleys D)the number of support ropes as counted between the pulleys E)the total number of pulleys

21. 25 pt question from H2 Tell the IMA of the 3 pulleys shown.

22. 25 pt answer from H2 Tell the IMA of the 3 pulleys shown. A)2 B)2 C)4

23. 5 pt question from H3 What does AMA stand for? A)Allowable Mechanical Advantage C) B) Acrimonious Machine Alliance C) Actual Mechanical Advantage D) Actual Mechanical Energy

24. 5 pt answer from H3 What does AMA stand for? A)Allowable Mechanical Advantage C) Actual Mechanical Advantage B) Acrimonious Machine Alliance C) Actual Mechanical Advantage D) Actual Mechanical Energy

25. 10 pt question from H3 Using a pulley, a student is able to lift a 400N box using a 100N effort. The number of support strands is 5. What is the AMA? A) 4 B) 4N C) 5 D) 5N E) Cannot be determined from the information given.

26. 10 pt answer from H3 4 Using a pulley, a student is able to lift a 400N box using a 100N effort. The number of support strands is 5. What is the AMA? A) 4 B) 4N C) 5 D) 5N E) Cannot be determined from the information given. The IMA would be 5, but the AMA compares forces.

27. 15 pt question from H3 True – False: The AMA is always less than or equal to the IMA. A) True B) False C) Usually true D) Usually False

28. 15 pt answer from H3 True – False: The AMA is always less than or equal to the IMA. A) True B) False C) Usually true D) Usually False

29. 20 pt question from H3 How do we calculate the AMA? A) Fout / Fin B) Fin / Fout C) Din / Dout D) Dout / Din E) W / t F) Fd

30. 20 pt answer from H3 Fout / Fin How do we calculate the AMA? A) Fout / Fin B) Fin / Fout C) Din / Dout D) Dout / Din E) W / t F) Fd

31. 25 pt question from H3 A 400N load is lifted using a 200N effort. The frictional force overcome is 50N. What is the AMA? A) 8 B) 8N C) 4 D) 4N E) 2 F) 2N

32. 25 pt answer from H3 A 400N load is lifted using a 200N effort. The frictional force overcome is 50N. What is the AMA? E) 2 A) 8 B) 8N C) 4 D) 4N E) 2 F)2N FYI, the IMA = 400N / (200N – 50N) = 2.67

33. 5 pt question from H4 Which two equations below tell us how to calculate the efficiency of a machine ? A) Eff = F  t B) Eff = W out / W in C) Eff = F out / F in D) Eff = W in / W out E) Eff = AMA / IMA F) Eff = IMA / AMA

34. 5 pt answer from H4 B) Eff = W out / W in E) Eff = AMA / IMA Which two equations below tell us how to calculate the efficiency of a machine ? A) Eff = F  t B) Eff = W out / W in C) Eff = F out / F in D) Eff = W in / W out E) Eff = AMA / IMA F) Eff = IMA / AMA Best to use “E”

35. 10 pt question from H4 If a machine is 85% efficient, what percentage of nonmechanical energy results from the work input? A) 85% B) 15% C) ½ of 85% = 42.5% D) ½ of 15% = 7.5% E) 0%

36. 10 pt answer from H4 B) 15% If a machine is 85% efficient, what percentage of nonmechanical energy results from the work input? A) 85% B) 15% C) ½ of 85% = 42.5% D) ½ of 15% = 7.5% E) 0% The 15% of work input not conserved converts to nonmechanical energy, such as heat and sound.

37. 15 pt question from H4 True—False If a machine is 100% efficient then mechanical energy is conserved. A) Always true. B) Sometimes true. C) Always false. D) Sometimes false.

38. 15 pt answer from H4 True—False If a machine is 100% efficient then mechanical energy is conserved. A) Always true. B) Sometimes true. C) Always false. D) Sometimes false.

39. 20 pt question from H4 A machine has an IMA = 4.0 and an AMA = 3.0. What is the efficiency of this machine?

40. 20 pt answer from H4 A machine has an IMA = 4.0 and an AMA = 3.0. What is the efficiency of this machine? Eff = AMA/IMA = ¾ =.75  75%

41. 25 pt question from H4 A pulley has a total of 6 strands. The last one (being pulled upon) is being pulled downward. The result is that a 300N weight is lifted by pulling with 100N of force. What is the efficiency of this pulley? A) 50% B) 60% C)75% D) 80% E) 100%

42. 25 pt answer from H4 A pulley has a total of 6 strands. The last one (being pulled upon) is being pulled downward. The result is that a 300N weight is lifted by pulling with 100N of force. What is the efficiency of this pulley? B) 60% A) 50% B) 60% C)75% D) 80% E) 100%

43. 5 pt question from H5 What is the present record this season of Mr. Bruce’s favorite football team?

44. 5 pt answer from H5 What is the present record this season of Mr. Bruce’s favorite football team? 5-3 5-3

45. 10 pt question from H5 Work is… and is measured in … A)force x distance Joules B)force/time watts C)force x area Joules D)energy x distance Joules E)energy/time watts F)power/time watts

46. 10 pt answer from H5 Work is… and is measured in… A)force x distance Joules B)force/time watts C)force x area Joules D)energy x distance Joules E)energy/time watts F)power/time watts

47. 15 pt question from H5 Power is… and is measured in… A)force x distance Joules B)force/time watts C)force x area Joules D)energy x distance Joules E)energy/time watts F)mechanical energy x time watts G)energy x time watts

48. 15 pt answer from H5 Power is… and is measured in… A)force x distance Joules B)force/time watts C)force x area Joules D)energy x distance Joules E)energy/time watts F)mechanical energy x time watts G)energy x time watts

49. 20 pt question from H5 Who did Lord Kelvin work with when they determined the mechanical equivalent of heat? Hint: His family was in the brewery business. A)Sir Isaac Newton B)Sir Lancelot C)James Prescott Joule D)Michael Jordan E)Joules Verne F) Nicholas Perry Joule

50. 20 pt answer from H5 Who did Lord Kelvin work with when they determined the mechanical equivalent of heat? Hint: His family was in the brewery business. A)Sir Isaac Newton B)Sir Lancelot C)James Prescott Joule D)Michael Jordan E)Joules Verne F) Nicholas Perry Joule

51. 25 pt question from H5 A machine lifts a 2.0 kg object 3.0 meters. If it does it in 2.0 seconds, what is the power output? A)About 30 watts B)About 30 J C)About 3 watts D)About 3 J E)About 12 watts F)About 12 J

52. 25 pt answer from H5 A machine lifts a 2.0 kg object 3.0 meters. If it does it in 2.0 seconds, what is the power output? A)About 30 watts B)About 30 J C)About 3 watts D)About 3 J E)About 12 watts F)About 12 J W = Fd = (2.0kg)(9.8m/s 2 )(3.0m) = 58.8 J 30 watts P = W/t = 58.8J/2.0 s = 29.4 watts ≈ 30 watts

53. Final Jeopardy What is the name of the subatomic particle which seemed to be clocked in 2011 to have traveled slightly faster than the speed of light? A)Alpha particle B)Beta particle C)Gamma ray D)Neutrino E)Higgs boson F)Lepton G)A Fermion quark

54. Final Jeopardy Answer What is the name of the subatomic particle which seemed to be clocked in 2011 to have traveled slightly faster than the speed of light? (They later reported 2 experimental errors.) A)Alpha particle B)Beta particle C)Gamma ray D)Neutrino E)Higgs boson F)Lepton G)A Fermion quark