A ball of mass `m` moving at  speed `v` makes a head on collision with an identical ball at rest.
Channel: Doubtnut
Date: 2020-07-12

A ball of mass `m` moving at  speed `v` makes a head on collision with an identical ball at rest. The kinetic energy of the balls after the collision is `3//4th` of the original. Find the coefficient of restitution.