Two equal masses `m_1` and `m_2` moving along the same straight line with velocites `+3 m//s` and `- 5 m//s` respectively collide elastically. Their velocities after the collision will be respectively.

Options

A. `+4m//s` for both
B. `-3 m//s and +5 m//s`
C. `-4 m//s and +4 m//s`
D. `-5 m//s and +3 m//s`

Answer

D

Explanation

As `m_(1)= m_(2)` therefore after elastic collision velocities of masses get interchanged
i.e. velocity of mass `m_(1)= -5 m//s`
and velocity of mass `m_(2)= +3 m//s`