Mass `m_(1)` strikes `m_(2)` which is at rest. The ratio of masses for which they will collide again. (Collisions between ball and wall are elastic. Coefficient of resttution between `m_(1)` and `m_(2)` is `e` and all the surface are smooth)

Options

A. `(e)/(2+e)`
B. `(2e)/(2+e)`
C. `(e)/(2(2+e))`
D. `1`

Answer

C

Explanation

`m_(1)u_(1) = -m_(1)v_(1)+m_(2)v_(2)`
`e = (2v_(1))/(v)`, for , `(m_(1))/(m_(2)) lt (e)/(2+e)`