2. Mechanisms Jeopardy Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

3. $100 Levers / Inclined Planes Of the three classes, the __________ is the only one in which the effort force and the load force act in the same direction.

4. $100 Levers / Inclined Planes 1st–class lever

5. $200 Levers / Inclined Planes An inclined plane with an IMA of 3.69 and an AMA of 2.97 is _______ efficient.

6. $200 Levers / Inclined Planes 80.5%

7. $300 Levers / Inclined Planes _____________ levers, like the one in the diagram below, will always have a mechanical advantage with a value ________________.

8. $300 Levers / Inclined Planes 3rd-class; between 0 and 1

9. $400 Levers / Incline Planes The ideal effort force that would be needed to move this lever in the absence of friction is _______.

10. $400 Levers / Incline Planes 75 pounds

11. $500 Levers / Inclined Planes __________ is the ideal mechanical advantage of this inclined plane. 99 in..

12. $500 Levers / Inclined Planes 2.93

13. $100 Wheel and Axles / Pulleys The ideal mechanical advantage of a pulley system is indicated by the ______________.

14. $100 Wheel & Axles / Pulleys Number of Support Cables

15. $200 Wheel & Axles / Pulleys ___________ is the linear distance traveled in one revolution by a wheel with a 21 inch diameter.

16. $200 Wheel & Axles / Pulleys 65.94 inches

17. $300 Wheel & Axles / Pulleys A wheel and axle system that is 75% efficient contains an axle that has an 8 inch diameter. The distance from the center of the axle to the crank handle is ___________, given that the system’s ideal mechanical advantage is 4.

18. $300 Wheel & Axles / Pulleys 16 inches

19. $400 Wheel & Axles / Pulleys The pulley system shown is ________ efficient.

20. $400 Wheel & Axles / Pulleys 67 %

21. $500 Wheel & Axles / Pulleys A shutoff valve is designed to operate with 65 pounds of effort force. The valve will encounter 325 pounds of resistance force applied to a 4 inch diameter axle. The required wheel diameter to overcome the resistance force is __________.

22. $500 Wheel & Axles / Pulleys 20 inches

23. $100 Screws / Wedges The diameter of the screw in diagram is __________.

24. $100 Screws / Wedges 1 inch

25. $200 Screws / Wedges To calculate the pitch of a unified screw thread, one must ______________________.

26. $200 Screws / Wedges divide the value of 1 inch by the number of threads that occur in 1 inch parallel to the screw axis.

27. $300 Screws / Wedges Make an annotated sketch of a isosceles-shaped wedge. Include all variables associated with the calculation its actual mechanical advantage.

28. $300 Screws / Wedges

29. $400 Screws / Wedges A wrench with an 8 inch handle is used to install a ¼ - 24 UNF bolt into the engine of a truck. The mechanical advantage gained in the system is ____________.

30. $400 Screws / Wedges 602.88

31. $500 Screws / Wedges An actual effort of 500 pounds is applied to the wedge shown. Given that the wedge’s cutting action is 90% efficient, the resistance applied to the wedge is ________.

32. $500 Screws / Wedges 900 pounds

33. $100 Gears / Chain Drives The difference between a simple gear train and a compound gear train is ___________.

34. $100 Gears / Chain Drives Simple gear trains have only one gear per shaft. Compound gear trains have at least one idler gear shaft that carries two gears.

35. $200 Gears / Chain Drives The gear ratio of the simple gear train shown is ______.

36. $200 Gears / Chain Drives 4 : 1

37. $300 Gears / Chain Drives When calculating gear ratio, the number of teeth, diameter, and torque have direct relationships. While _____________ has an inverse relationship to the others.

38. $300 Gears / Chain Drives Angular Velocity

39. $400 Gears / Chain Drives In the belt driven system shown, pulley B has a diameter of 16 inches. It is being driven by pulley A, which has a diameter of 4 inches. If pulley A is spinning at 60 RPMs, then pulley B is spinning at _____________.

40. $400 Gears / Chain Drives 15 RPMS

41. $500 Gears / Chain Drives A compound gear train is composed of four gears, A, B, C, and D. Gear A has 15 teeth and is meshed with gear B. Gear B has 25 teeth and shares a shaft with gear C, which has 10 teeth. Gear C is meshed with gear D, the output gear. Power is supplied at gear A with 100 ft·lb of torque and is traveling at 1600 rpm. Gear D should have _______ teeth for the system to have the necessary torque output of 800 ft·lb

42. $500 Gears / Chain Drives 48

43. $100 Key Words The ratio of the magnitude of the resistance and effort forces applied to a system.

44. $100 Key Words Actual Mechanical Advantage

45. $200 Key Words A force that produces or tends to produce rotation or torsion

46. $200 Key Words Torque

47. $300 Key Words A gear positioned between the driver and the driven gear used to change rotational direction.

48. $300 Key Words Idler Gear

49. $400 Key Words The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

50. $400 Key Words Moment

51. $500 Key Words A condition where there are no net external forces acting upon a particle or rigid body and the body remains at rest or continues at a constant velocity

52. $500 Key Words Static Equilibrium

53. Final Jeopardy _______ is the ideal mechanical advantage of this compound machine.

54. Final Jeopardy Answer 36