(1) When the object is stationary on a surface, the static frictional force balances the force component that is attemptingto slide the object along the surface. (2) The maximum possible magnitude of that force is given by Eq. 6-1 ( fs,max msFN).(3) If the component of the applied force along the surfaceexceeds this limit on the static friction, the block begins toslide. (4) If the object slides, the kinetic frictional force isgiven by Eq. 6-2