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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Three identical spheres of mass each are placed at the corners of an equilateral triangle of side . Taking one of the corners as the origin, the position vector of the centre of mass is

Answer: (B)

Solution

Place the origin at one vertex, the second vertex at , and the third at (using side length ). Then and

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Question ID VK-158428