Physics · WORK, ENERGY AND POWER

A block of mass \( m_1 = 2\text{ kg} \) moving with a speed of \( 6\text{ m s}^{-1} \) collides with a stationary block of mass \( m_2 = 4\text{ kg} \). If the collision is completely inelastic, what is the ratio of the kinetic energy lost during the collision to the initial kinetic energy of the system?

1. A
   \( \frac{1}{3} \)
2. B
   \( \frac{2}{3} \)
3. C
   \( \frac{1}{2} \)
4. D
   \( \frac{4}{9} \)