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Two balls of equal mass have a head-on collision with speed 6 m/s. If the coefficient of restitution is $\frac{1}{3}$ , the speed of each ball after impact in m/s is _________.

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detailed solution

Correct option is B

$By definition of e:$

$e = \frac{v_{2} - v_{1}}{u_{1} - u_{2}} \Rightarrow \frac{1}{3} = \frac{v + v}{6 + 6} \Rightarrow v = 2 m / s$

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detailed solution

Correct answer is 2

$By definition of e:$

$e = \frac{v_{2} - v_{1}}{u_{1} - u_{2}} \Rightarrow \frac{1}{3} = \frac{v + v}{6 + 6} \Rightarrow v = 2 m / s$

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Two balls of equal mass have a head-on collision with speed 6 m/s. If the coefficient of restitution is 13, the speed of each ball after impact in m/s is _________.