The angular velocity of a body changes from ω1 to ω2 without applying torque but changing moment of inertia. The ratio of initial radius of gyration to the final radius of gyration is

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ω2:ω1

ω22:ω12

ω2:ω1

1/ω2:1/ω1

answer is C.

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Detailed Solution

I1ω1=I2ω2 or MK12ω1=MK22ω2K1K2=ω2ω1

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