Originally Posted by
jhota
uh, the static coefficient of friction only has to do with surfaces that are not moving with respect to each other.
the only time your tyres experience static friction is when you're stopped.
when you brake, if the wheels are turning your stopping power is coming from rolling friction (which is a kinetic friction). if they're locked, you've got sliding friction (which is also kinetic friction). sliding friction almost always has a greater coefficient than rolling.
i agree that in most cases "locking up" is a dumb way to stop. but it's not because of the amount of force you can apply - it's because of the lack of control you have in how that force is applied.
http://hyperphysics.phy-astr.gsu.edu/hbase/frict2.html
The amount of traction which can be obtained for an auto tire is determined by the coefficient of static friction between the tire and the road. If the wheel is locked and sliding, the force of friction is determined by the coefficient of kinetic friction and is usually significantly less.
http://ffden-2.phys.uaf.edu/211_fall...icFriction.htm
It is better, therefore, for your tire to be using static friction rather than kinetic friction. If the tire is rolling along so that the surface touching the ground is never sliding, then static friction is acting to slow the car.
It would appear that multiple school's physics departments disagree with you. As well as do I. Please do show evidence if you actually happen to know what you're talking about.