Question

Two equal masses $m_1$ and $m_2$ moving along the same straight line with velocities $+3m/s$ and $-5m/s$ respectively collide elastically. Their velocities after the collision will be respectively :

• A. $+4m/s$ for both
• B. $-3m/s$ and $+5m/s$
• C. $-4m/s$ and $+4m/s$
• D. $-5m/s$ and $+3m/s$

Answer 1

The correct option is D $-5m/s$ and $+3m/s$

As $m_1=m_2$, therefore after elastic collision velocities of masses gets interchanged.