Physics - W.E.P. Question with Solution | TestHub

A body of mass ' $m$ ' connected to a massless and unstretchable string goes in verticle circle of radius ' $R$ 'under gravity $g$. The other end of the string is fixed at the center of circle. If velocity at top of circular path is $n\sqrt{gR}$, where, $n⩾1$, then ratio of kinetic energy of the body at bottom to that at top of the circle is