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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Two particles A and B, initially at rest, move towards each other under a mutual force of attraction. At an instant when the speed of A is and the speed of B is , the speed of the centre of mass is

Answer: (A)

Solution

Initially both particles are at rest, so . Since the only force is the mutual (internal) attraction

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Question ID VK-158432