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 ...

or chains to minimize friction and wear. It also helps dissipate excess heat that could otherwise destroy the gearbox when it overheats. The absence of physical gears means CVTs are more likely to ...

Modern tires are amazing pieces of technology, but even they have limitations. It comes down to friction forces and vector math. Your car and tire combine to provide one total friction force, ...