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NEET AIPMT SOLVED PAPER SCREENING 2008

  • question_answer
    Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be

    A) Mv newton     

    B)       2Mv newton

    C) \[\frac{Mv}{2}\]newton              

    D) zero

    Correct Answer: A

    Solution :

    Force required, \[F=\frac{d(mv)}{dt}\] \[=v\left( \frac{dm}{dt} \right)=vM\]as velocity v is constant, hence F = Mv newton


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