. . . "http://en.wikipedia.org/wiki/Friction"^^ . "\\(\\mu = \\frac{F}{N}\\), where \\(F\\) is the tangential component of the contact force and \\(N\\) is the normal component of the contact force between two sliding bodies."^^ . "Dynamic Friction Coefficient"@en . . "http://www.iso.org/iso/catalogue_detail?csnumber=31889"^^ . . "http://dbpedia.org/resource/Friction"^^ . "Kinetic (or dynamic) friction occurs when two objects are moving relative to each other and rub together (like a sled on the ground)." . "\\(\\mu\\)"^^ . . . .