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Two particles having masses m and 2m are travelling along x-axis on a smooth surface with velocities u1 and u2, collide. If their velocities after collision are v1 and v2, then the ratio of velocities of their centre of mass before and after impact is
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Correct option is C
During the course of collision, forces acting on the system are internal forces and no net external force acts on the system. Hence acceleration is non zero and therefore velocity of COM does not change due to the impact. so option (3) is right.Similar Questions
If fig four identical spheres of equal mass m are
suspended by wires of equal length /, so that all spheres are almost touching to each other. If the sphere 1 is released from the horizontal position and
all collisions are elastic, the velocity of sphere 4 iust after collision is
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