InterviewSolution
Saved Bookmarks
| 1. |
The amount of work done in lifting body of mass 'm' from the surface of the earth to a height equal to twice the radius of the earth is 1) 2GMm/3R 2) 3GMm/2R 3) 5GMm/3R 4) 3GMm/5R |
|
Answer» work done W = - delta UW = -[GMm(1/r1 - 1/r2)]W = -[GMm (1/R - 1/3R)]W = -GMm(2/3R)W = -2GMm / 3R joule |
|