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November 20, 2020
Assignment for Nursing Tutors
November 20, 2020

Chuck (mass = 70 kg) and Dan (mass = 80 kg) are working as window washers at Walter Library.

Chuck (mass = 70 kg) and Dan (mass = 80 kg) are working as window washers at Walter

Library. Chuck gets the bright idea of tying each of them to either end of a rope and hanging

it over a pulley to wash the windows. Chuck stands on the flat roof while Dan hangs from

the 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 he

begins slipping.

If the value of the coefficient of kinetic friction between Chuck’s shoes and the wet roof

μk = 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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Chuck (mass = 70 kg) and Dan (mass = 80 kg) are working as window washers at Walter Library. was first posted on November 20, 2020 at 2:28 pm.
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