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  4. Two balls of equal mass undergo head on collision while each was moving with speed 6 m / s. If the coefficient of restitution is (1/3), the speed of each ball after impact will be

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Q. Two balls of equal mass undergo head on collision while each was moving with speed $6\, m / s$. If the coefficient of restitution is $\frac{1}{3}$, the speed of each ball after impact will be

Work, Energy and Power

Solution:

$v =\frac{u}{2}(1-e)$
$=\frac{6}{2}\left(1-\frac{1}{3}\right)$
$=2\, m / s$