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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Topic Test - Newton's Laws Of Motion

  • question_answer
    Two trains A and B are running in the same direction on parallel tracks such that A is faster than B. If packets of equal weight are exchanged between the two, then

    A) A will be retarded but B will be accelerated

    B) A will be accelerated but B will be retarded

    C) there will be no change in velocity of A but B will be accelerated

    D) there will be no change in velocity of B, but A will be accelerated

    Correct Answer: A

    Solution :

    [a] Initially, the momentum of packet in train A is more than in train B. When packets are changed the packet reaching train A being of lower momentum will retard the train A but packet reaching train B, being of higher momentum will accelerate B.


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