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(Solution) - A window washer pushes his scrub brush

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A window washer pushes his scrub brush up a vertical window at constant speed by applying


a force F as shown in Fig. 5.65. The brush weighs 12.0 N and the coefficient of kinetic friction is ?k = 0.150. Calculate (a) the magnitude of the force F and (b) the normal force exerted by the window on the brush.



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This question was answered on: Jul 11, 2017

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