Q. A bullet of mass $M$ hits a block of mass $M'$. The transfer to energy is maximum, when
A) $M^{'} = M$
B) $M^{'} = 2M$
C) $M^{'} < \ < M$
D) $M^{'} > \ > M$
Explanation
(a) If $M = M'$ then bullet will transfer whole of its velocity (and consequently 100% of its KE) to block and will itself come to rest as per theory of collision.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.