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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Motion of Connected Bodies

  • question_answer
    Two masses \[{{m}_{1}}\] and \[{{m}_{2}}\] are attached to a string which passes over a frictionless smooth pulley. When \[{{m}_{1}}=10kg,\] \[{{m}_{2}}=6kg,\,\]the acceleration of masses is [Orissa JEE 2002]           

    A)             20 \[m/{{s}^{2}}\]

    B)             \[5m/{{s}^{2}}\]

    C)             2.5 \[m/{{s}^{2}}\]

    D) \[10m/{{s}^{2}}\]

    Correct Answer: C

    Solution :

                    \[a=\left( \frac{{{m}_{2}}-{{m}_{1}}}{{{m}_{1}}+{{m}_{2}}} \right)g=\left( \frac{10-6}{10+6} \right)\times 10=2.5\,m/{{s}^{2}}\]


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