A stationary particle explodes into two particles of mass \( m_{1} \) and \( m_{2} \), which mov....
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0A stationary particle explodes into two particles of
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mass \( m_{1} \) and \( m_{2} \), which move in opposite directions with velocities \( v_{1} \) and \( v_{2} \). The ratio of their kinetic energies \( E_{1} / E_{2} \) is
(1) 1
(2) \( \frac{m_{1} v_{2}}{m_{2} v_{1}} \)
(3) \( \frac{m_{2}}{m_{1}} \)
(4) \( \frac{m_{1}}{m_{2}} \)
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