Re: [Phys-l] Bicycle question

["Bob Sciamanda" <trebor@winbeam.com>]

Leigh, I'm confused.  The road forces occur at the tire/road contact 
points - how can they then produce a torque about an axis through those 
points (isn't the "lever arm" zero?) ?

Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
http://www.winbeam.com/~trebor/
trebor@winbeam.com
----- Original Message ----- 
From: "Leigh Palmer" <palmer@sfu.ca>
To: <phys-l@carnot.physics.buffalo.edu>
Sent: Thursday, August 24, 2006 7:31 PM
Subject: Re: [Phys-l] Bicycle question

> . . .
> The reaction force of the road in this new position exerts a
> torque about the line containing the contact points of both tires
> with the road . . .