A body of mass 'm' is rotating in a vertical circle of radius 'r' with critical speed at the highest point. The difference in its K.E. at the top and the bottom is

A body of mass 'm' is rotating in a vertical circle of radius 'r' with

1.	A body of mass 'm' is rotating in a vertical circle of radius 'r' with critical speed at the highest point. The difference in its K.E. at the top and the bottom is
Answer» 2mgr 4 mgr 6 mgr 3 mgr Answer :A