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AP and TS EAMCET Medical Model Paper 7

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Question : 101

Total: 158

A cord of negligible mass is wound round the rim of a fly wheel of mass 20 kg and radius 20cm. A steady pull of 25N is applied on the cord. The fly wheel is mounted on a horizontal axle with frictionless bearing's.
a) Work done by the pull, when 2m of the cord in unwound is 50J
b) The kinetic energy of the wheel at this point (assume that the whell starts from rest) is 50J

a and b are true
a and b are false
a true & b flase
a false & b true

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