3 ms·
> For some physics reason I don't entirely understand, the tires have better friction with a slippery surface when they're still spinning Nothing complex about
by pedrocr 12y ago
> For some physics reason I don't entirely understand, the tires have better friction with a slippery surface when they're still spinning
Nothing complex about this, the coefficient of friction in most reasonable cases is higher when the two surfaces aren't sliding.
>Newer cars have what's called an "Anti-Lock Braking System (ABS)", but it usually doesn't work very well. I'm pretty sure it's just there for the people that have never driven in snow before. It's actually worse to trigger it sometimes.
ABS is far from new. It was introduced in airplanes in the 1930s and has existed in cars since the 1970s. It's rare for cars these days not to have it. It's also much safer than pulsed braking because the anti-lock feature is applied per-wheel and not globally, so you can safely steer for example.
Apparently ABS reduces braking distances on asphalt and may increase them on snow/gravel because in some of those situations locked wheels can actually brake more by digging into the surface. More modern systems probably fix that and I bet even the old ones are still safer in real situations where you need to brake and steer.
https://en.wikipedia.org/wiki/Anti-lock_braking_system https://en.wikipedia.org/wiki/Anti-lock_braking_system