A body of mass m1 moving with an unknown
velocity of ${v_1}\mathop i\limits^ \wedge $, undergoes a collinear collision
with a body of mass m2 moving with a velocity
${v_2}\mathop i\limits^ \wedge $ . After collision, m1 and m2 move with
velocities of ${v_3}\mathop i\limits^ \wedge $ and ${v_4}\mathop i\limits^ \wedge $ , respectively.
If m2 = 0.5 m1 and v3 = 0.5 v1, then v1 is :-
${v_4} - {{{v_2}} \over 2}$
${v_4} - {{{v_2}} \over 4}$
${v_4} - {v_2}$
${v_4} + {v_2}$
Solution
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