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

  • question_answer
    A uniform thin rod AB of length L has linear mass density \[\mu (x)=a+\frac{bx}{L},\]where x is measured from A. If the CM of the rod lies at a distance of \[\left( \frac{7}{12}L \right)\]from A, then a and b are related as :          [JEE MAIN 11-04-2015]

    A)   a = b 

    B)        a = 2b

    C)   2a = b           

    D)        3a = 2b

    Correct Answer: C

    Solution :

    [c]
               
               
               
                   
               


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