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22 April, 06:47

A 20 kg box has been lifted 0.7m. How much work has been done?

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  1. 22 April, 07:05
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    The work done is 137 joules.

    Lifting opposes the acceleration of gravity, which is 9.8 m/sec/sec.

    20 x 0.7 x 9.8 = 137 J (kg-m2/sec2)
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