However, this is a good thing for ice skating and sledging. Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a ...

Schematic illustration of Friction Force Microscopy (FFM). The AFM cantilever, a small diving board-like structure about 200 micrometers long, 50 micrometers wide, and 1 micrometer thick, has a sharp ...