Question

A small steel ball B is at rest on the edge of a table of height h=1m. Another steel ball A, used as the bob of a simple pendulum also of length h=1m, is released from rest with the pendulum suspension horizontal, and swings against B as shown in the diagram.The masses of the balls are identical and the collision is elastic.

(a)Which ball is in motion for the longest time?
(b)Which ball covers the greatest distance?
ball b for 2 nd option

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