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Old 05-22-2011, 06:27 PM   #58
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Join Date: Feb 2008
Location: Philadelphia
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My Ride: M3 & ZHP
Originally Posted by mkodama View Post
Basic equation for friction of non-deformable objects is F=mu*N

F: Force due to friction
mu: coefficient of friction; varies by material
N: normal force, the force "pushing" the two objects together

If you notice, area does not come into this equation at all, which is where a lot of people get it wrong.

EDIT: I was actually just kinda trolling you, but you gave an unexpectedly mature response so I will take the effort to write this stuff out.
This has always bugged me - if friction is independent of contact area, then why do wider tires grip better than narrow tires? I would think the coefficient itself would vary a bit with the contact area
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