Collisions – Elastic Collision in One Dimension

2019 1 question

1. 1 Work, Energy and Power Medium
   Body A of mass $4m$ moving with speed $u$ collides with another body B of mass $2m$, at rest. The collision is head on and elastic in nature. After the collision the fraction of energy lost by the colliding body A is:
   A $\frac{1}{9}$ B $\frac{8}{9}$ C $\frac{4}{9}$ D $\frac{5}{9}$
   Check Answer