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

`(4)`

Explanation

Since both bodies are identical and collision is elastic. Therefore velocities will be interchanged after collision.
`v_(A) = -0.3 m/s and v_(B) = 0.5 m/s`