Friction - Physics 101 / AP Physics 1 Review with Dianna Cowern

The link between static and dynamic friction and intermolecular forces was quite interesting. It makes you really think about static friction as a macroscopic manifestation of the molecular stickiness but I still think there is an intermediate microscopic scale where it is mostly due to the rough surface and jumping over the bumps without getting trapped inside holes if you are going fast enough. The molecular stickiness is probably a dominant factor only on very smooth surfaces.