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

A particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration `a_(c)` is varying with time t as `a_(c) = k^(2)rt^(2)`, where k is a constant. The power delivered to the particle by the forces acting on it is :

A

`2pimk^(2)r^(2)t`

B

`mk^(2)r^(2)t`

C

`((mk^(4)r^(2)t^(5)))/(3)`

D

zero

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The correct Answer is:
B
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