A window washer pushes his scrub brush up a vertical window


A window washer pushes his scrub brush up a vertical window at constant speed by applying a force F as shown in the figure below. The brush weights 12.0 N and the coefficient of kinetic friction is uk=.150.

1013_A window washer pushes his scrub brush up a vertical window.png

Determine:

a) The magnitude of the force F.

b) The normal force exerted by the window on the brush.

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Physics: A window washer pushes his scrub brush up a vertical window
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