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24-01-2018
Physics

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What is the work Sarah,60kg does against gravity is she goes up a 4m high stairwell in 3 seconds?

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calculista calculista

03-02-2018

Work can be obtained from the following expression

W = F*d

Where F is the force (In this case the force it takes to lift Sarah, which is mass*gravity)

And d is the distance traveled.

W = 60kg*9.8m/s^2 * 4m = 2352 Joules

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