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22 September, 01:05

A woman carries a 10kg box up a set of 5m high stairs and then down a 12m long hallway. How much work does she do on the box?

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  1. 22 September, 01:08
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    Answer: 1666J

    Explanation:

    Given that,

    Mass of box (m) = 10kg

    Total distance covered by box (h)

    = (5m + 12m)

    = 17m

    work done on the box = ?

    Work is done when force is applied on an object over a distance. Hence, the magnitude of work done on the box depends on its mass (m), distance covered (h), and acceleration due to gravity (g)

    (g has a value of 9.8m/s²

    i. e Work = mgh

    Work = 10kg x 9.8m/s² x 17m

    Work = 1666J

    Thus, 1666 joules of work was done by the woman on the box.
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