MHT CET Physics question
A horizontal circular platform of mass 'M' is rotating at angular velocity '' about a vertical axis passing through its centre. A boy of mass 'm' is standing at the edge of platform. If the boy comes to the centre of the platform then new angular velocity becomes [MHT-CET 2019, MHT-CET 2019]
Answer: (D)
Solution
Angular momentum is conserved: , so ; (a) and (c)
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