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JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Second Law of Motion

  • question_answer
    A gun of mass \[10kg\] fires 4 bullets per second. The mass of each bullet is 20 g and the velocity of the bullet when it leaves the gun is \[300\,m{{s}^{-1}}.\] The force required to hold the gun while firing is [EAMCET (Med.) 2000]

    A)             6 N

    B)               8 N

    C)             24 N   

    D)             240 N

    Correct Answer: C

    Solution :

                    Rate of change of momentum of the bullet in forward direction = Force required to hold the gun. \[F=nmv=4\times 20\times {{10}^{-3}}\times 300=24\,N\]


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