NON-DELIVERY of: NON-DELIVERY of: Re: Friction

["Lotus Mail Exchange" <lotusmex@nas.edu>]

> Everyone seems anxious to teach that static friction is greater than
sliding > friction and demonstrate it with objects on ramps etc.  Yet, for
most of us > car tires are the most improtant application of friction we
experience, and > they work the other way around.  Anybody have any good
demonstrations to show > a case where static friction is less, to simulate
tires?  Quite honestly, I
> think this is another case like the half a lens, and tides, where well
> intentioned teachers who are out of touch with the real world mislead
their > students.  In this case wrong ideas about friction could lead to an
accident.
>
If static friction is less then kinetic friction, then why all the
engineering put into anti-lock brakes?  I can tell you from personal
experience that kinetic friction (sliding) is less than static friction.
After nearly running into a family of four two winters ago, you will not
convince me otherwise.

Lowell Herr
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