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A mass M is supported by a massless string wound round a uniform cylinder of mass M and radius E as shown in fig. On releasing the mass from rest, it
wiII fall with acceleration
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Correct option is D
Mgh=12Mv2+12Iω2=12Mv2+1212MR2ω2=12Mv2+14Mv2=34Mv2v=2ah∴ Mgh=34M×2aha=23gSimilar Questions
A flywheel is in the form of a uniform circular disc of radius 1 m and mass 2 kg. The work which must be done on it to increase its frequency of rotation from 5 rps to 10 rps is approximately
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