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A particle of mass m is moving in a hori...

A particle of mass m is moving in a horizontal circle of radius R under a centripetal force equal to `-A/r^(2)` (A = constant). The total energy of the particle is :-
(Potential energy at very large distance is zero)

A

`A/R`

B

`- A/R`

C

`A/(2R)`

D

`- A/(2R)`

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The correct Answer is:
D
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