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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A binary star consists of two stars (mass ) and (mass ), where is the mass of the sun. They are separated by distance and are rotating about their centre of mass, which is stationary. Find the ratio of the total angular momentum of the binary star to the angular momentum of star about the centre of mass.

Answer: 6

Solution

Both stars share the same about the common CM, with and . So

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Question ID VK-158859