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The bob \( \mathrm{A} \) of a simple pendulum is released when the string makes an angle of \( 45^{\circ} \) with the vertical. It hits another bob \( B \) of the same material and same mass kept at rest on the table. If the collision is elastic [Kerala (Engg.) 2001]
(a) Both \( A \) and \( B \) rise to the same height
(b) Both \( A \) and \( B \) come to rest at \( B \)
(c) Both \( A \) and \( B \) move with the same velocity of \( A \)
(d) A comes to rest and \( B \) moves with the velocity of \( A \)
B
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