Physics · WORK, ENERGY AND POWER

A body of mass \( m_1 \) moving with initial velocity \( v_{1i} \) collides head-on completely inelastically with a stationary body of mass \( m_2 \). The fraction of initial kinetic energy lost in the collision is:

1. A
   \( \frac{m_2}{m_1 + m_2} \)
2. B
   \( \frac{m_1 m_2}{(m_1 + m_2)^2} \)
3. C
   \( \frac{m_1}{m_1 + m_2} \)
4. D
   \( \frac{m_1 - m_2}{m_1 + m_2} \)