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A small mass m is moved slowly from the ...

A small mass m is moved slowly from the surface of the earth to a height h above the surface. The work done (by an external agent) in doing this is

A

mgh , for all values of h

B

mgh for `h lt lt R`

C

`1/2 mgR` , for `h=R`

D

`-1/2 mgR` for `h=R`

Text Solution

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The correct Answer is:
B, C
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