Free Body Diagrams

http://www.physicsclassroom.com/Class/newtlaws/u2l2c1.gif

This free body diagram is showing an object with an equal force . I know this because the Fnorm is equal to Fgrav so the is nothing pulling it or pushing it up or down. Also Ffrict and Fapp are equal to each other so there is no force pulling in it to the left or right.