In Q. No. 4-27, if the collision is perfectly elastic, the bob of the pendulum will rise to a he...

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In Q. No. 4-27, if the collision is perfectly elastic, the bob of the pendulum will rise to a height of:
(A) \( \frac{v^{2}}{g} \)
(B) \( \frac{v^{2}}{2 g} \)
(C) \( \frac{v^{2}}{4 g} \)
(D) \( \frac{v^{2}}{8 g} \)
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