Work Power And Energy

Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed \omega about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation

A force acts on a particle in direction where is in newton and y in meter. Work done by this force to move the particle from to m is: