Two oils were tested. Mineral oil and a vegetable oil. The coefficient of friction of the vegetable was found to be lesser than mineral oil but the roughness was higher in vegetable oil.
Hello
The coefficient of friction depends on the tangential force and normal force - u = Ft / Fn. While the traction coefficient is heavily dependent on the sample roughness, the contact area, the pulling or pushing mass, and the visor of the mask. The water temperature depends on the temperature. As the temperature rises, the viscosity decreases.
With respect
Emil Yankov
As far as I know, friction and traction have the same meaning in lubrication : thus friction coefficient (tangential force/normal force) = traction coefficient.
Fluid traction is more employed when a large friction coefficient is desired, like in traction drives.
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