Physics · JEE | WORK, ENERGY AND POWER

In a completely inelastic head-on collision between two masses \( m_1 \) (moving with speed \( v_{1i} \)) and \( m_2 \) (at rest), the final common velocity \( v_f \) of the combined masses is given by:

1. A
   \( v_f = \frac{m_2 v_{1i}}{m_1 + m_2} \)
2. B
   \( v_f = \frac{m_1 v_{1i}}{m_1 + m_2} \)
3. C
   \( v_f = \frac{(m_1 + m_2)v_{1i}}{m_1} \)
4. D
   \( v_f = \frac{m_1 - m_2}{m_1 + m_2} v_{1i} \)