JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Second Law of Motion

  • question_answer
    A cart of mass M is tied by one end of a massless rope of length 10 m. The other end of the rope is in the hands of a man of mass M. The entire system is on a smooth horizontal surface. The man is at x = 0 and the cart at x = 10 m. If the man pulls the cart by the rope, the man and the cart will meet at the point                            [CBSE PMT 1997]

    A)                         \[x=0\]            

    B)                         \[x=5\,m\]          

    C)                         \[x=10\,m\]                 

    D)                         They will never meet

    Correct Answer: B

    Solution :

                              In the absence of external force, position of centre of mass remain same therefore they will meet at their centre of mass.          


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