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April 24, 2014

Homework Help: Physics

Posted by George on Monday, September 20, 2010 at 2:09am.

In moving a 35.0 kg desk from one side of a classroom to the other, a professor finds that a horizontal force of 300 N is necessary to set the desk in motion, and a force of 185 N is necessary to keep it in motion at a constant speed.

(a) What is the coefficient of static friction between the desk and the floor?
(b) What is the coefficient of kinetic friction between the desk and the floor?

I know that F=ma, but how do you do this?

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