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9 October, 18:31

It takes 160 kj of work to accelerate a car from 24.0 m/s to 27.5 m/s. what is the car's mass?

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  1. 9 October, 18:44
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    Work-Energy : W = 1/2 m (Vf^2 - Vo^2)

    Vo = 24.0 m/s Initial speed

    Vf = 27.5 m/s Final speed

    W = 1/2 m (Vf^2 - Vo^2)

    160 kj = 1 / 2 m (27.5^2 - 24.0 ^2)

    160kj = 4680 x m

    convert kilo joules to jeoules 160000 j = 4689 xm

    m = 160000 j/4689

    m = 34.18 kg
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