Researchers use single sheets and pairs of sheets of graphene to understand sources of friction.<BR><BR><a href='http://arstechnica.com/science/2009/03/resistance-is ...

In this video, we break down the concept of the coefficient of friction in AP Physics 1, explaining how static and kinetic friction work and how they affect motion. Clear examples and reasoning help ...

Most people have experienced the hair-raising effect of rubbing a balloon on their head or the subtle spark caused by dragging socked feet across the carpet. Although these experiences are common, a ...

Scientists developed a new model, which shows that rubbing two objects together produces static electricity, or triboelectricity, by bending the tiny protrusions on the surface of materials. Most ...

Figure 1: Fiber displacement due to insufficient adhesion force (left) and simplified force equilibrium on winding surface (right). Photo Credit, all images: IVW Leibniz-Institut für Verbundwerkstoffe ...

I learned to respect friction, as a phenomenon with many nuances, when I was a graduate student. One day, while teaching a problem session in elementary mechanics, I unwisely invented a new problem to ...