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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Conservation of Linear Momentum and Impulse

  • question_answer
    A wagon weighing 1000 kg is moving with a velocity 50km/h on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which it moves now is [MP PMT 1994]            

    A)                         2.5 km/hour            

    B)                           20 km/hour            

    C)                         40 km/hour               

    D)                         50 km/hour

    Correct Answer: C

    Solution :

                                According to principle of conservation of linear momentum \[1000\ \,\times 50=1250\,\ \times v\] Þ \[v=40\,km/hr\]            


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