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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

The centre of mass of three particles of masses 1 kg, 2 kg and 3 kg, at a fixed reference position, is at . Where should a fourth particle of mass 4 kg be placed so that the centre of mass of the system of all particles shifts to ?

Answer: (B)

Solution

for the first three . For the new CM: $=1

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Question ID VK-158444