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

Options

A. `- `0.3 m/s and 0.5 m/s
B. 0.3 m/s and 0.5 m/s
C. `-`0.5 m/s and 0.3 m/s
D. 0.5 m/s and `-`0.3 m/s

Answer

D

Explanation

Since both bodies are identical and collision is clastic. Therefore velocitics will be interchanged after collision
`v_A`=-0.3 m/s and `v_n`=0.5 m/s