Question

Two identical balls A and B having velocities of $0.5m/s$ and $–0.3m/s$ respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be

• A. $–0.3m/s$ and $0.5m/s$
• B. $0.3m/s$ and $0.5m/s$
• C. $-0.5m/s$ and $0.3m/s$
• D. $0.5m/s$ and $-0.3m/s$

Answer 1

The correct option is D $0.5m/s$ and $-0.3m/s$

Since both bodies are identical and collision is elastic. Therefore velocities will be interchanged after collision.

$v_A=–0.3m/s$ and $v_B=0.5m/s$