J & K CET Medical J & K - CET Medical Solved Paper-2008

  • question_answer
    A gun fires N bullets per second, each of mass m with velocity v. The force exerted by the bullets on the gun is

    A) \[vNm\]                                              

    B) \[\frac{mv}{N}\]

    C) \[mv{{N}^{2}}\]                                               

    D) \[\frac{m{{v}^{2}}}{N}\]

    Correct Answer: A

    Solution :

                     \[F=p\times t\] \[=Nm(v-u)t\] \[=mNv\]      (as\[u=0,\text{ }t=1\text{ }s\])


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