Question

Body B₁ collides with boy B₂ of same mass but at rest, what will happen to them?

Answer 1

When body (B₂) is at rest, we get

\(v_1=\frac{m_1-m_2}{m_1+m_2}u_1\)

and \(v_2=\frac{2m_1}{m_1m_2}u_1\)

Putting m₁ = m₂ = m, we get v₁ = 0 and v₂ = u₁, i.e., body B₁ comes to rest whereas body B₂ moves with the velocity of body B₁.