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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A mass is whirled in a circular path with a constant angular velocity and its angular momentum is L. If the string is now halved keeping the angular velocity same, the angular momentum is

Answer: (A)

Solution

, so halving r with the same gives ; L,

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Question ID VK-040527