A thin uniform square plate with side l and mass M can rotate freely about a stationary vertical axi
Channel: Doubtnut
Date: 2020-08-16

A thin uniform square plate with side l and mass M can rotate freely about a stationary vertical axis coinciding with one of its sides. A small ball of mass m flying with velocity v at right angles to the plate strikes elastically the centre of it. Find:  (a) the velocity of the ball `v^'` after the impact,  (b) the horizontal component of the resultant force which the axis will exert on the plate after the impact.