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AMU Medical AMU Solved Paper-2014

  • question_answer
    Two uniform rods of different materials \[{{M}_{1}}\] and \[{{M}_{2}}\] have lengths 2 m and 3 m, respectively. The mass per unit length of rods \[{{M}_{1}}\] and \[{{M}_{2}}\] are 1 kg and 2 kg respectively. If the rods are arranged, as shown, the position of the cm relative to point O is

    A)  4.9m                    

    B)  3.9 m   

    C)  2.9 m                   

    D)  2.2 m

    Correct Answer: C

    Solution :

                     The position of CM relative to point \[O=\frac{{{l}_{1}}+{{l}_{2}}}{\sqrt{3}}\]\[=\frac{2+3}{\sqrt{3}}=\frac{5}{1.732}\]= 2.886 m = 2.90 m


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