Two masses mA and mB moving with velocities VA and VB in opposite directions collide elastically. After that the masses mA and mB move with velocity VB and VA respectively. The ratio (mA/ mB) is
1
1
2
\(\frac{{{V_A} + {V_B}}}{{{V_A} - {V_B}}}\;\)
3
\(\frac{{{V_A} - \;{V_B}}}{{{V_A} + \;{V_B}}}\;\)
4
\(\frac{{{V_A}}}{{{V_B}}}\;\)