uoo play

. One mega watt is equivalent to ……… watt.

1. If the work done in 9s is 63 J, the power is ……. .
2. There are …….. W in 1 hp.
3. 1 kW power is ……… than 1 hp.
4. The unit watt is the same as …… .
5. The unit one joule per second is equivalent to ……… .
6. The mechanical advantage of a machine depends on the ………. present.
7. Mechanical advantage is the ratio of the …… to the effort.
8. The velocity ratio is usually much greater than ………. .
9. If a machine is …….. the mechanical advantage will be equal to the velocity ratio.
   26.The ability to retain the original form is called ……… .
10. The ratio of the stress to the strain is ……… .
11. A spring obeys ……… law.
12. Within elastic limit ….. is directly proportional to the strain.
13. The strain produced is proportional to the ………. .
14. The force applied to an elastic body is called ………. .
15. The ratio of the load to ……. is defined as mechanical advantage.
16. The ……… of a machine is always less than 100%.
17. One ……… is equal to a rate of energy transfer of 1 joule per second.
    35.The SI unit of power is ……… .
18. The SI unit of the mechanical power is ……. .
19. If the work done in 1 second is ……. the power is 1 watt.
20. The strain produced is proportional to the ……… .
21. The rate of doing work is defined as ………. .
    Key
22. newton(N) 2. newton(N) 3. joule(J) 4. foot-pound(ft-lb) 5. potential 6. joule(J)
23. power 8. velocity 9. power 10. power 11. power 12. power 13. power
24. horse power(hp) 15. 7.46 x 109 16. 106 17. 7 W 18. 746 19. greater