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For finding the moment of inertia of a d isc with radius R we assume...

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For finding the moment of inertia of a d isc with radius R we assume that the di sc is made up of many small rings of m ass dm radius x and width dx But as x tends to R the mass of the small rings s hould increase i e dm should increase The small ring which is farther from ce ntre should have a higher dm as compa red to those which are closer to centre But we assume that dm is constant for integration Why do we assume that all small rings should have the same mass dm Scientifically it is not possible

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