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8 October, 12:19

Paul is running with a KE of 600 J if he starts at rest and his final velocity is 4 m/s what is his mass

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  1. 8 October, 15:09
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    We use the kinetic energy equation and substitute our data solving for the mass:

    ke = (1/2) mv^2

    m = 2*ke/v^2

    m = 2*600/4^2

    m = 1200/16

    m = 75 kg

    we can substitute directly because the units are homogeneus in the SI system: J, m/s, kg
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