Question

Two identical balls A and B collide head on elasticity. If the velocity of A and B before collision are $0.5m{s}^{-1}$ and $-0.3m{s}^{-1}$ respectively, then their velocities after collision will be.

• A. $0.5m{s}^{-1}$ and $0.3m{s}^{-1}$
• B. $-0.5m{s}^{-1}$ and $0.3m{s}^{-1}$
• C. $0.3m{s}^{-1}$ and $-0.5m{s}^{-1}$
• D. $-0.3m{s}^{-1}$ and $0.5m{s}^{-1}$

Answer 1

The correct option is D $-0.3m{s}^{-1}$ and $0.5m{s}^{-1}$

Two identical bodies exchange their velocities after head-on elastic collision.