question_answer

The bob A of a simple pendulum is released when the string makes an angle of\[{{45}^{o}}\] with the vertical. It hits an other bob B of the same material and same mass kept at rest on the table. If the collision is elastic:

A)  both A and B rise to the   b 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

E)  B moves first and A follows it with half of its initial velocity