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Grade: 12th pass
        
Please sir solve this Q.
Q-A ball falls from a height h over a inclined plane of a 30(see attachment).After collision ,ball moves horizontally, the coefficient of restitution is 
Ans-1/3
one year ago

Answers : (1)

Khimraj
3008 Points
							
Coefficient of restitution is defined as the ratio of velocity of separation and velocity of approach along the line of impact.
Let the velocity of ball before colliding horizontal surface is u, then velocity is u cos θ
Given that particle moves after collision in horizontal direction, so the velocity of the particle just after the collision along the direction of line of impact is v sin θ
   The coefficient of restitution is,
e=vsinθ/u cos θ= (v/u)tan θ
here v = utanθ
so e = tan2θ = 1/3
Hope it clears...........................
one year ago
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