a gear-driven alternator. There are three basic sources of friction loss in gear drives: Tooth-to-tooth sliding contact: ...

high performance bicycles used friction shifting. To oversimplify this technology, there are no clicks in the shifter, and you just move it until the chain goes into the correct gear, kind of like ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Get Instant Summarized Text (Gist) A new form of superlubricity has been observed where bismuth islands move on graphite with near-zero friction, but only along specific directions. This ...

Friction is an everyday phenomenon; it allows drivers to stop their cars by breaking and dancers to execute complicated moves on various floor surfaces. It can, however, also be an unwanted effect ...