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CBSE Class 12-science Answered

A ball of mass M moving at a speed V make the head on collision with another identical ball At rest the kinetic of the ball after collision is 4% of the original.find the cofficient of restitution
Asked by ritukkr4444 | 01 Sep, 2019, 12:49: PM
answered-by-expert Expert Answer
Let initial velocity of ball before collision = u m/s
 
velocity after collision = ( e u )  m/s  , where e is coefficient of restitution .
 
Initial kinetic energy = (1/2)m u2  J
 
kinetic energy after collision = (1/2) m e2 u2   J
 
It is given that after collision, kinetic energy becomes 4% of initial value
 
hence ,  e2 u2 = 0.04 u2   or  e = 0.2
Answered by Thiyagarajan K | 01 Sep, 2019, 04:21: PM

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