Humans have been making fire by friction for centuries, but it's not easy. Cyndi Monaghan/Moment via Getty Images Fire by friction is a testament to human ingenuity, contributing to the development of ...

Learn how tension and friction interact when an object moves at constant velocity. This video breaks down the force balance, explains why acceleration is zero, and shows how physics principles apply ...

A, Driving locomotion of a rectangular plate on a frictional surface through excitations of elastic waves by pulsed optical absorption. Table: relationships between motion states of the plate, ...

Scientists have made an insight into superlubricity, where surfaces experience extremely low levels of friction. This could benefit future technologies by reducing energy lost to friction by moving ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...