Question

Two particles of masses m and 2m moving in opposite directions collide elastically with velocities v and ν. Find their velocities after collision.

Answer 1

Here, u₁ = –ν, u₂ = 2ν, m₁ = m and m₂ = 2m.

Substituting these values in equations(v) and (vi), we get

i.e., the second particle (of mass 2m) comes to a rest while the first (ofmassm) moves with velocity 3ν in the direction shown in figure.