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Q.

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 returns to her hand. The coefficient of restitution between the wall and the ball is kgdv2gd where ‘k’ is ____

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Detailed Solution

T=d(v/2)+d(ev/2)=1+1e2dv

 where T=2Vsin45g

2v/2g=1+1e2dve=gdv2gd

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