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KVPY Sample Paper KVPY Stream-SX Model Paper-14

  • question_answer
    A cart of mass mg starts moving right due to a constant horizontal force F. At same time, sand starts falling into cart from a stationary hopper. Rate of loading is constant and equal to Velocity of cart at time t is

    A)

    B)

    C)

    D)

    Correct Answer: A

    Solution :

    Let velocity of cart in v at time t. When sand particle falls onto cart, its' relative velocity with respect to cart is (backwards), so force of sand on cart is backwards.
    Net force on cart is
           
           
           
           
           
           


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