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A particle of mass in is moving in a cir...

A particle of mass in is moving in a circular with of constant radius `r` such that its contripetal accelenation `a_(c) ` is varying with time `t` as `a_(c) = K^(2) rt^(2)` where K` is a constant . The power delivered to the particles by the force action on it is

A

`2pi m k^(2) r^(2) t`

B

`m k^(2) r^(2) t`

C

`(m k^(4) r^(2) t^(5))/(3)`

D

Zero

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The correct Answer is:
B
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