First slide

Collisions

Question

Two equal masses m₁ and m₂ moving along the same straight line with velocities + 3 m/s and – 5 m/s respectively collide elastically. Their velocities after the collision will be respectively

Moderate

A

+ 4 m/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

Solution

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 $m_{2} = + 3 m / s$

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