A mass is moving in a circular path with constant speed. What is the work done in 3/4 of a rotation?

A body is moving in a circular path with constant speed

What is work done?

A particle moves in a circular path with decreasing speed. What happens to its angular momentum?

What is the S.I. unit of work done?

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

When a body moves with constant speed along a circle

If a body is moving in a circle of radius r with a constant speed v m/s. Its angular velocity is

A particle moves in a circle of radius R with a constant' speed under a centripetal force F. The work done in completing a full circle is :