Window washers at WalterLibrary

by | Oct 5, 2021 | Assignment

Chuck (mass = 70 kg) and Dan (mass = 80 kg) are working as window washers at WalterLibrary. Chuck gets the bright idea of tying each of them to either end of a rope and hangingit over a pulley to wash the windows. Chuck stands on the flat roof while Dan hangs fromthe other end of the rope, ten meters off the ground. (See illustration below.) However,it begins to rain, reducing the frictional force between Chuck’s shoes and the roof, and hebegins slipping.If the value of the coefficient of kinetic friction between Chuck’s shoes and the wet roof?k = 0.25, (a) what is the acceleration of Chuck and Dan?(b) What is the tension in the rope while they are accelerating?(c) With what speed does Dan land on the ground below?Neglect the mass of the rope and the pulley.

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