Materials scientists are measuring the rolling friction of tiny, micrometer-sized particles. These measurements permit them to better understand everyday products such as concrete.

Take this everyday example: when a coffee mug rests on a flat table ... To put it this way: once the static friction has been overcome, the sliding friction sets in and consumes additional energy. To ...

Lacquers, paint, concrete—and even ketchup or orange juice: Suspensions are widespread in industry and everyday life ... in order to measure their sliding friction. This friction is many ...