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9th Class Science Work and energy Question Bank Work Power and Energy Conceptive Subjective Problems

  • question_answer
    A body mass 4 kg is moving with a speed of \[\text{1}0\text{ m}{{\text{s}}^{-\text{1}}}\] Find its kinetic energy.

    Answer:

    Given,   \[m=4kgv=10m/s\]                 \[K.E.=?\] We know, \[K.E.=\frac{1}{2}m{{v}^{2}}=\frac{1}{2}\times 4{{(10)}^{2}}=200J\]


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