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A little boy is in a treehouse, 18 feet up in a tree. He lifts...

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Physics

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A little boy is in a treehouse, 18 feet up in a tree. He lifts a 3-lb rope hand over hand up to the treehouse. The rope fully extends from the treehouse down to the ground (18ft long). How much work (in ft-lb) is required to pull the rope to the treehouse?

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