JEE Main & Advanced Physics Rotational Motion JEE PYQ-Rotational Motion

  • question_answer
    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 -
                             [JEE Online 08-04-2017]

    A)  \[\frac{2Mg}{2m+M}\] 

    B)       \[\frac{2Mg}{2M+m}\]

    C)  \[\frac{2mg}{2M+m}\] 

    D)       \[\frac{2mg}{2m+M}\]

    Correct Answer: D

    Solution :

    [d] mg - T = ma
        


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