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A small body is initially at a distance ...

A small body is initially at a distance `r` from the centre of earth. `r` is greater than the radius of the earth. If it takes `W` joule of work to move the body from this position to another position at a distance `2r` measured from the centre of earth, how many joule would be required to move it from this position to a new position at a distance of `3r` from the centre of the earth.

A

`W//5`

B

`W//3`

C

`W//2`

D

`W//6`

Text Solution

Verified by Experts

The correct Answer is:
B
`W=GPE_(2)-GPE_(1)` Here `GPE=-(Gm_(1)m_(2))/(r_(12)`
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