A ball impinges directly on a similar ball at rest. If $1/4^{th}$ of the kinetic energy is lost by the impact, the value of coefficient of restitution is
A ball impinges directly on a similar ball at rest. If $1/4^{th}$ of the kinetic energy is lost by the impact, the value of coefficient of restitution is
- A
$\frac {1}{2\sqrt 2}$
- B
$\frac {1}{\sqrt 3}$
- C
$\frac {1}{\sqrt 2}$
- D
$\frac {\sqrt 3}{2}$
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