Experiment shows that when a dry and unlubricated body presses against a surfacein the same condition and a force attempts to slide the body along the surface,the resulting frictional force has three properties:Property 1. If the body does not move, then the static frictional force and thecomponent of that is parallel to the surface balance each other. They areequal in magnitude, and is directed opposite that component of .Property 2. The magnitude of has a maximum value fs,max that is given by