Metastable fluidized granular systems can spontaneously defluidize, forming glass- or crystal-like structures. We performed experiments with polymer spheres of different friction and roughness ...

In physics, friction is defined as a phenomenon in which two or more objects move in the tangential direction of the contact surface or have a relative movement tendency; The force between the contact ...

Researchers have uncovered friction without contact—driven entirely by magnetic interactions. As two magnetic layers slide, their internal forces compete, causing constant rearrangements that ...