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Angular momentum of the particle rotating with a central force is constant due to
detailed solution
Correct option is A
Because the central force passes through axis of rotation and hence torque will be zero.Talk 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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