Physics question work power energy please help... please show the working?

Q1. a particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration a is varying with time as a=(k^2)r(t^2) where k is constant. the power delivered to the particle by the forces acting on it is? (ans m(k^2)(r^2)t) Q2. A body is moving along a straight line by a... show more Q1. a particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration a is varying with time as a=(k^2)r(t^2) where k is constant. the power delivered to the particle by the forces acting on it is? (ans m(k^2)(r^2)t)

Q2. A body is moving along a straight line by a machine delivering constant power. the distance moved by the body in time t is proportional to ? (ans. t^3/2)
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