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3 October, 19:28

There are 152 steps between the ground floor and the sixth floor in a building. Each step is 16.2 cm tall. It takes 3 minutes and 35 seconds for a person with a mass of 59.5 kg to walk all the way up. How much work did the person do?

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  1. 3 October, 21:09
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    14.4kJ

    Explanation:

    Work = Force x distance

    W * h = mgh

    Given that,

    mass m, = 59.5kg

    acceleration due to gravity = 9.8m/s^2

    height, h = 16.2cm

    convert to m is 0.162m

    How much work = m x g x h

    height is 0.162 x 152 steps

    h = 24.624m

    work = 59.5 x 9.8 x 24.624

    = 14,358.25Joule

    = 14.4kJ
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