A uniform disc of radius R and mass M is free to rotate only about its axis. A string is wrapped over its rim and a body of mass m is tied to the free end of the string as shown in the figure. The body is released from rest. Then the acceleration of the body is :

Question

${{2\,\,mg} \over {2\,m + M}}$

${{2\,\,Mg} \over {2\,m + M}}$

${{2\,\,mg} \over {2\,M + m}}$

${{2\,\,Mg} \over {2\,M + M}}$

Solution

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