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19 March, 11:27

Meg lifted a box of books with a mass of 20 kg from the floor to a shelf 1.4 m off the ground. The applied force was equal to the weight of the box of books. How much work did Meg do?

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  1. 19 March, 11:57
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    The work done is equal to the potential energy, so:

    Epg=mgh

    Epg=20kg*9,81m/s²*1,4m

    Epg=274,68J
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