Q. The bob $A$ 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
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 $A$
Explanation
(d) Due to the same mass of $A$ and $B$ as well as due to elastic collision velocities of spheres get interchanged after the colision
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.