Questions
Three identical masses are kept at the corners of an equilateral triangle ABC under the action of mutual force of attraction, A moves towards B with a speed V, B moves towards C with speed V, and C moves towards A with same speed V. Then the speed of centre of mass of the system of particles is
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Correct option is E
No external force acting on the system is zero. Hence acceleration of centre of mass of the system is zero. Therefore Vc = 0.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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