The bob A of a simple pendulum is released when the string makes an angle of 45° with the vertical. It hits another bob B of the same materialand same mass kept at rest on the table. If the collision is elastic, then
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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
answer is D.
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Detailed Solution
Due to the same mass of A and B as well as due to elastic collision velocities of spheres get interchanged after the collision.