Re: [Phys-l] Another tire question

["LaMontagne, Bob" <RLAMONT@providence.edu>]

________________________________

From: phys-l-bounces@carnot.physics.buffalo.edu on behalf of John Denker
Sent: Tue 11/6/2007 4:12 PM
To: Forum for Physics Educators
Subject: Re: [Phys-l] Another tire question



> > At the Way Things Work site they talk about the footprint area of the
> > tires
> > times the pressure equalling the weight of the car. 
>
>
> This is correct if you specify the pressure as that between the road and
> the tires - not the air pressure inside the tire.

It should come to pretty much the same thing. 

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??? Pascal  vases constructed so the bases have the same area but the volumes above are all different all have the same internal pressure at the bottom if filled to the same depth. But, if placed on a table, they exert different pressures against the table because of the different weights. Why should the pressure inside the tire be the same as the pressure of the tire against the road? 

 

Bob at PC