Friction Calculation: Formula for Determining Wheel-Surface Friction

[961008]

How can we calculate the friction between the wheels and the surface in contact? I know that big wheels will have a greater friction, but what is the formula to calculate it?

 

[jbriggs444]

What source tells you that big wheels have a greater friction? And what dimension of "big" do you have in mind -- width, diameter, size of contact patch, weight?

 

[961008]

What source tells you that big wheels have a greater friction? And what dimension of "big" do you have in mind -- width, diameter, size of contact patch, weight?

The friction I refer to is the friction per revolution of the wheel. The "big" refers to the diameter of the wheels, with the same width.

 

[jbriggs444]

Friction is normally measured in units of force. How does that make sense in describing friction "per revolution"?

 

[CWatters]

Do you mean friction or rolling resistance?