Author(s): Hiroshi Sakuma, Diane E. Moore, David A. Lockner, and Toshihiro Kogure The Amontons-Coulomb friction law assumes that the frictional force between materials is independent of sliding velocity. However, as Coulomb noted, this is a rough approximation, and a second-order dependence of friction on the logarithm of sliding velocity is incorporated in a commonly used “rate-… [Phys. Rev. Lett. 137, 046201] Published Mon Jul 20, 2026