Question

Bob $A$ of a simple pendulum is released w hen the string makes an angle of $45^\circ$ with vertical. It hits another $bob\, B$ of same material and same mass kept at rest on table. If the collision is elastic

• A. both A and B rise to same height
• B. both A and B come to rest at B
• C. both Aand B move with velocity of A
• D. A comes to rest and B moves with velocity of A.

Answer 1

Answer: (D)

A comes to rest and B moves with velocity of A.

Answer 2

On elastic collision, the velocities will exchange i.e. bob A comes to rest and B moves with velocity of A.