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22 January, 18:09

A sprinter has a mass of 80kg and a kinetic energy of 4000 j. What is the sprinter's speed

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  1. 22 January, 18:38
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    The formula of the kinetic energy is KE = 0.5*m*v^2.

    Given m = 80 kg and KE = 4000 J,

    4000 = 0.5*80*v^2

    v^2 = 100

    v = 10 m/s
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