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AMU Medical AMU Solved Paper-2005

  • question_answer
    A force of 10 N acts on a body of mass 20 kg for 10 s. The change in its momentum is

    A)  50kg-m/s                           

    B)  100 kg-m/s

    C)  300 kg-m/s        

    D)  1000 kg-m/s

    Correct Answer: B

    Solution :

                     From Newtons second law of motion, rate of change of momentum is equal to the force acting on the body. Therefore,                 \[F=\frac{dp}{dt}\] Given,   F = 10 N, dt = 10 s                 \[dp=Fdt\]                 \[=10\times 10=100\,kg-m/s\]


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