# I need help deriving a formula to describe the effect to toe in on speed

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• Oct 12th 2009, 12:53 AM
Xplorer
I need help deriving a formula to describe the effect to toe in on speed
At first I thought it might just be a simple equation using $cos{\theta}$ where ${\theta}$ is the degrees of toe in.

http://i551.photobucket.com/albums/i...22/toein-1.jpg

But thats not it. I need to take into account rolling friction.
The equation for rolling resistance is

$F=cN$

F is the force of rolling friction
c is the rolling resistance coefficient
N is the normal force.

I think it might be along the lines of

F(final) = $Fcos{\theta} - cN$

Here is a pic of what I'm talking about:
http://i551.photobucket.com/albums/i...untitled-2.jpg

Then I need to relate Force to Velocity.
Any ideas?

-Tony
• Oct 13th 2009, 03:16 AM
BabyMilo
What is your question?