A particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration ac is varying with time as ac = k2rt2 , where k is a constant. The power delivered to the particle by the forces acting on it is
1
2 mk2r2t
2
mk2r2t
3
\(\rm \frac{1}{3}mk^4r^2t^5\)
4
0