1. The document discusses different simple machines and their components, including levers, pulleys, inclined planes, and wedges. 2. It also covers concepts like mechanical advantage, efficiency, power, and the relationships between effort force, resistance force, work input, and work output. 3. Several examples are provided to demonstrate calculations for mechanical advantage, power, work, and efficiency.

1. Chapter 5 Review

2. 1. A device that makes work easier. 2. Effort force (Fe) and Resistance force (Fr) 3.The force applied to the machine. 4. The force applied by the machine.

3. 5. Work input (Win) and Work output (Wout) 6. Work done on the machine 7. Work done by the machine Ideal Machine The number of times a machine multiplies the effort force.....MA.

4. 10. MA = Fr / Fe 11. Look at the board. 12. Newtons (N) 13. There’s no ending units for MA. 14. A device that does work with only one movement.

5. 15. Size; direction 16. Lever, pulley, wheel and axle, inclined plane, screw and wedge. 17. A bar that is free to pivot or turn about a fixed point. 18. The fixed point of a lever

6. 19. The part of the lever where the effort force is applied. 20. The part of the lever where there is resistance. 21. 1 st , 2 nd and 3 rd class 22. 2 nd class 23. 1 st class 24. 3 rd class

7. 25. A grooved wheel with rope running along the groove. 26. Fixed, moveable and block and tackle 27. 2 wheels of different sizes that rotate together 28. A sloping surface used to raise objects.

8. 29. Screw 30. An inclined plane with 1 or 2 sloping sides…knife or ax blade 31. 1 32. A machine made up of 2 or more simple machines. 33. Ax or bicycle

9. 34. A measure of how much work put into a machine is changed to useful work. 35. Efficiency = W out / W in X 100 36. The rate at which work is done. Measure of amount of work done in a certain amount of time.

10. 37. P = W / t 38. Look at the board 39. Watts (W) 40. Joules (J) 41. Seconds

11. 42. MA = Fr / Fe MA = 1500 N / 250 N MA = 6 43. P = W / t P = 2500 J / 3 s P = 833.33 Watts

12. W = P x t W = 500 W x 60 sec. W = 30,000 Joules 45. Efficiency = Wout/Win X100 Eff = 80 J / 100 J Eff = .80 X 100 = 80 %