A hardened steel ball, moving with velocity u, strikes a smooth horizontal surface at an angle of 60o with the surface. Just after the impact the ball starts moving making an angle of 45o with the surface. Then coefficient of restitution is
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answer is 2.
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Detailed Solution
Since the surface is smooth, V cos 45o=u cos60o⇒uv=2Again e=V sin45o-00-(-u sin60o)=vu.23∴e=12.23=13