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