miion seepion

. The force applied to an elastic body is called ………. .

1. The ratio of the load to ……. is defined as mechanical advantage.
2. The ……… of a machine is always less than 100%.
3. One ……… is equal to a rate of energy transfer of 1 joule per second.
   35.The SI unit of power is ……… .
4. The SI unit of the mechanical power is ……. .
5. If the work done in 1 second is ……. the power is 1 watt.
6. The strain produced is proportional to the ……… .
7. The rate of doing work is defined as ………. .
   Key
8. newton(N) 2. newton(N) 3. joule(J) 4. foot-pound(ft-lb) 5. potential 6. joule(J)
9. power 8. velocity 9. power 10. power 11. power 12. power 13. power
10. horse power(hp) 15. 7.46 x 109 16. 106 17. 7 W 18. 746 19. greater
11. joule per second(J s-1) 21. one watt 22.friction 23. load