A penny with a mass m sits on a horizontal turntable at a distance r from the axis of rotation. The turn table accelerates at a rate of `alpha rad//s^(2)` from t=0 The penny starts slipping at `t=t_(1)` The friction coefficient on the surface of turn table and the penny is `mu` find :
(i) The direction in which it starts sliding
(ii) The magnitude of frictional force at time `t=t_(2)(t_(2) gt t_(1))`

Answer

A