A girl throws a ball with an initial velocity v at an angle `45^@`. The ball strikes a sm
Channel: Doubtnut
Date: 2020-04-12

A girl throws a ball with an initial velocity v at an angle `45^@`. The ball strikes a smooth vertical wall at a horizontal distance d from the girl and after rebound returns to her hands. What is the coefficient of restitution between wall and ball ? `(v^2 gt dg)`