Q. A particle$\ P$ moving with speed $v$ undergoes a head–on elastic collision with another particle $Q$ of identical mass but at rest. After the collision
A) Both $P$ and $Q$ move forward with speed $\frac{v}{2}$
B) Both $P$ and $Q$ move forward with speed $\frac{v}{\sqrt{2}}$
C) $P$ comes to rest and $Q$ moves forward with speed $v$
D) $P$ and $Q$ move in opposite directions with speed $\frac{v}{\sqrt{2}}$
Explanation
The correct answer is Option C: $P$ comes to rest and $Q$ moves forward with speed $v$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.