(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

As shown in the figure, a block is pushed up against the wall. Let the mass of the block be m=2.3 kg, the coefficient of kinetic friction between the block and the wall be µ= 0.53, and θ= 62. Suppose F = 68 N.

The acceleration of gravity is 9.8 m/s^2.

Find the force of friction. Answer in units of N.

http://img359.imageshack.us/my.php?image=71957582pz7.jpg

http://img359.imageshack.us/my.php?image=71957582pz7.jpg

2. Relevant equations

Fk= µ ( F sin θ - mg)

F=ma

3. The attempt at a solution

Well first I used F= µ(F sin θ), but I figured it was too simple, so I drew a free body diagram and saw mg going down on the block. I'm not sure how to go from there. Does the vertical component of force equal mg?

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# Homework Help: Force of friction on a block

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