, how much work is done by the man against gravity in climbing to the top?

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Author:Raymond A. Serway, John W. Jewett
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Chapter11: Angular Momentum
Section: Chapter Questions
Problem 11.53AP
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A 170-lb man carries a 20-lb can of paint up a helical staircase that encircles a silo with radius 15 ft. If the silo is 60 ft high and the man makes exactly two complete revolutions, how much work is done by the man against gravity in climbing to the top?

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