. "http://www.iso.org/iso/catalogue_detail?csnumber=31889"^^ . "Static Friction Coefficient"@en . "http://en.wikipedia.org/wiki/Friction"^^ . . . "\\(\\mu = \\frac{F_max}{N}\\), where \\(F_max\\) is the maximum tangential component of the contact force and \\(N\\) is the normal component of the contact force between two bodies at relative rest."^^ . "\\(\\mu\\)"^^ . "Static friction is friction between two or more solid objects that are not moving relative to each other. For example, static friction can prevent an object from sliding down a sloped surface. " . "http://dbpedia.org/resource/Friction"^^ . . . . . .