From: Heidi Black (blackh@exchange.esuhsd.org)
Date: Wed Jan 26 2000 - 12:50:56 PST
Message-ID: <388F5E2A.5D8018AB@exchange.esuhsd.org> Date: Wed, 26 Jan 2000 12:50:56 -0800 From: Heidi Black <blackh@exchange.esuhsd.org> Subject: Re: pinhole friction with tires
Sarah-I use the example of the kids having to move a wrestling mat around. Usually they roll it up and then slide it across the
floor. At least with materials that compress, sliding friction is less than rolling friction, hence antilock brakes.
Heidi
bliss wrote:
> Hi pinhole --
>
> My colleague and I were talking about how to calculate the friction
> coefficient between car tires and a road. We agree that it is probably a
> coefficient of static friction that we are looking for, as the tire and
> road surface do not slide with respect to each other as the car moves. But
> my colleague also seems to remember somewhere reading about "rolling
> friction" as distinct from static friction. We can't find it in any of our
> current books. Does anyone else have info about this?
>
> Cheers, Sarah Wise
>
> İİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİİ
>
> Sarah Wise
>
> Lick-Wilmerding H.S.
> 755 Ocean Avenue
> San Francisco, CA 94112
> swise@lick.pvt.k12.ca.us
>
> "Not everything that can be counted counts,
> and not everything that counts can be counted."
> --Albert Einstein
>
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