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19 March, 08:39

A window washer stands on a scaffolding 30 meters above the ground. If he did 23,520 joules of work to reach the scaffolding what is his mass

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  1. 19 March, 09:06
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    Work done by gravity = 23,520 J = mgh. Therefore m = 23520 / 30 x 9.8 = 80 kg.
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