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Question

A solid cylinder of mass M and R is mounted on a frictionless horizontal axle so that it can freely rotate about this axis. A string of negligible mass is wrapped round the cylinder and a body of mass m is hung from the string as shown in figure the mass is released from rest then

The acceleration with which the mass falls is

  1. g    
  2. fraction numerator m g over denominator M end fraction    
  3. open parentheses fraction numerator m g over denominator M plus m end fraction close parentheses    
  4. fraction numerator 2 M n g over denominator left parenthesis M plus 2 text end text m right parenthesis blank end fraction    

The correct answer is: fraction numerator 2 M n g over denominator left parenthesis M plus 2 text end text m right parenthesis blank end fraction

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