Saturday
April 19, 2014

Homework Help: physics

Posted by Bella on Wednesday, February 27, 2013 at 1:47pm.

A window washer pushes his scrub brush →−
up a vertical window at constant speed by applying a force F as
shown in Fig. P5.74. The brush weighs 15.0 N and the coefficient
of kinetic friction is μk = 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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