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Two particles A and B initially at rest move towards each other under a mutual force of attraction. At the instant when the speed of A is V and the speed of B is 2v, the speed of the centre of mass of the system is
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Correct option is A
Initially the COM of the system is at rest. Since no net external force acts on the system, acceleration of COM of the system is zero. Hence at any time, the COM will be at rest.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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