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How much work is required to stop the mass?

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A 10-kg mass is moving with a speed of 5.0 m/s. How much work is required to stop the mass?

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  1. W = differenceOf E = |E[starting] - E[final]|

    E[starting] = 0.5mv^2 = 0.5*10*5^2 = 125J

    E[final] = 0J    <-- the body will not be moving

    W = |125J - 0J| = 125J

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