A girl throws a ball with initial velocity v at an inclination of 45^(@). The ball strikes a smooth vertical wall at a horizontal distance d from the girl and after rebouncing return to her hand. The coefficient of retitution between the wall and the ball is (k g d)/(v^(2) - g d) where 'k' is

A girl throws a ball with initial velocity v at an inclination of 45^(

1.	A girl throws a ball with initial velocity v at an inclination of 45^(@). The ball strikes a smooth vertical wall at a horizontal distance d from the girl and after rebouncing return to her hand. The coefficient of retitution between the wall and the ball is (k g d)/(v^(2) - g d) where 'k' is
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