Mathematics, 12.08.2020 17:01 mhwalters

A 160-lb man carries a 5-lb can of paint up a helical staircase that encircles a silo with radius 20 ft. If the silo is 90 ft high and the man makes exactly three complete revolutions, how much work is done by the man against gravity in climbing to the top

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A 160-lb man carries a 5-lb can of paint up a helical staircase that encircles a silo with radius 20...