Two identical billiard balls are in contact on a smooth table. A third identical ball strikes th...

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Two identical billiard balls are in contact on a smooth table. A third identical ball strikes them symmetrically and comes to rest after impact. The coefficient of restitution is :
(A) \( \frac{2}{3} \)
(B) \( \frac{1}{3} \)
(C) \( \frac{1}{6} \)
(D) \( \frac{\sqrt{3}}{2} \)
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