A partical of mass `m_(1)` collides head on with a stationary partical of mass `m_(2)`. If `(m_(1))/(m_(2)) gt e` where `e` is the coefficient of restitution, then :

Options

A. `m_(1)` will return back
B. `m_(1)` will move in same direction
C. `m_(1)` will stop
D. unpredicatable

Answer

D

Explanation

`m_(1) = m_(1) V_(1) + m_(2) V_(2)`
and `V_(2) - V_(1) = eV`
on solving `V_(1) = (V(m_(1) - em_(2)))/((m_(1) - m_(2)))`
Given `(m_(1))/(m_(2)) gt e`
`m_(1) - em_(2) = 0`
so, `V_(1)` is positive and thus `m_(1)` will moves in same direction.