Questions
The angular velocity of a body changes from without applying torque but changing moment of inertia. The ratio of initial radius of gyration to the final radius of gyration is
detailed solution
Correct option is C
I1ω1=I2ω2 or MK12ω1=MK22ω2K1K2=ω2ω1Talk to our academic expert!
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A disc rotates freely with rotational kinetic energy E about a normal axis through centre. A ring having the same radius but double the mass of disc is now, gently placed on the disc. The new rotational kinetic energy of the system would be
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