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9th Class Science Work and energy Question Bank Work, Energy and Power

  • question_answer
    The kinetic energy of a body is increased by\[21%\]. What is the percentage increase in the linear momentum of the body?

    A) \[20%\]             

    B)        \[10%\]  

    C) \[30%\]             

    D)        \[5%\]

    Correct Answer: B

    Solution :

     \[%\] increase in momentum Change in momentum \[\text{=}\frac{\text{Change}\,\,\text{in}\,\,\text{momentum}}{\text{Initial}\,\,\text{momentum}}\text{ }\!\!\times\!\!\text{ 100}\]


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