A ball impinges directly on another ball at rest. The first ball is brought to rest by the impac...

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A ball impinges directly on another ball at rest. The first ball is brought to rest by the impact. If half of the kinetic energy is lost by the impact, the value of coefficient of restitution is
(1) \( \frac{1}{2} \)
(2) \( \frac{1}{\sqrt{3}} \)
(3) \( \frac{1}{\sqrt{2}} \)
(4) \( \frac{\sqrt{3}}{2} \)
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