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

  • question_answer
    One end of a massless rope, which passes over a massless and frictionless pulley P is tied to a hook C while the other end is free. Maximum tension that the rope can bear is 360 N. with what value of minimum safe acceleration (in \[m{{s}^{-2}})\] can a monkey of \[60\,kg\] move down on the rope              [AIEEE 2002]

    A)             16       

    B)             6

    C)             4         

    D)             8

    Correct Answer: C

    Solution :

                    If monkey move downward with acceleration a then its apparent weight decreases. In that condition Tension in string \[=m(g-a)\] This should not be exceed over breaking strength of the rope i.e. \[360\ge m(g-a)\]Þ\[360\ge 60(10-a)\] Þ \[a\ge 4\ m/{{s}^{2}}\]


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