MHT CET 2024 Physics question

A rotating body has angular momentum 'L'. If its frequency is doubled and kinetic energy is halved, its angular momentum will be

Answer: (A)

Solution

Angular momentum and kinetic energy , so . The frequency (hence ) is doubled and is halved, so \frac{2(K/2)}{2ω}\frac{1}{4}\frac{2K}{ω}$ =

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Question ID VK-093316