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9th Class Science Force and laws of motion Question Bank Force and Laws of Motion

  • question_answer
    A man weighing \[60\,\,kg\] is walking with a uniform velocity of\[4\,\,m\,\,{{s}^{-1}}\]. Calculate the momentum of a man.

    A) \[120\,\,m\,\,{{s}^{-1}}\]         

    B) \[240\,\,m\,\,{{s}^{-1}}\]  

    C) \[360\,\,m\,\,{{s}^{-1}}\]         

    D)        \[480\,\,m\,\,{{s}^{-1}}\]

    Correct Answer: B

    Solution :

     Mass of man\[(m)=60\,\,kg\] Velocity of man walking\[=4\,\,m\,\,{{s}^{-1}}\] Momentum \[=\] mass \[\times \] velocity                   \[=60\times 4=240\,\,m\,\,{{s}^{-1}}\]


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