A mass `m` moves in a circles on a smooth horizontal plane with velocity `v_(0)` at a
Channel: Doubtnut
Date: 2020-08-30

A mass `m` moves in a circles on a smooth horizontal plane with velocity `v_(0)` at a radius `R_(0)`. The mass is atteched to string which passes through a smooth hole in the plane as shown. The tension in string is increased gradually and finally `m` moves in a cricle of radius `(R_(0))/(2)`. the final value of the kinetic energy is