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If M(e) is the mass of earth and M(m) is...

If `M_(e)` is the mass of earth and `M_(m)` is the mass of moon `(M_(e)=81 M_(m))`. The potential energy of an object of mass m situated at a distance R from the centre of earth and r from the centre of moon, will be :-

A

`-GmM_(m) (R/81 +r) 1/R^(2)`

B

`-GmM_(e) (81/r+1/R)`

C

`-GmM_(m) (81/R+1/r)`

D

`GmM_(m) (81/R-1/r)`

Text Solution

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The correct Answer is:
C
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