en.wikipedia.org/wiki/Friction

The coefficient of friction (COF), often symbolized by the Greek ... Rougher
surfaces tend to have higher effective values.

www.engineeringtoolbox.com/friction-coefficients-d_778.html

It is commonly thought that the static coefficients of friction are higher than the
dynamic or kinetic values. This is a very simplistic statement and quite misleading
...

www.engineersedge.com/coeffients_of_friction.htm

Table of static and dynamic friction coeffcient and friction equations given in
imperial and SI metric units.

www.carbidedepot.com/formulas-frictioncoefficient.htm

Coefficient for Static Friction of Steel Chart. ... Materials and Material
Combinations, Coefficient of Friction. Clean, Lubricated. Steel, 0.74, 0.16. Copper
-lead alloy ...

blog.mechguru.com/machine-design/typical-coefficient-of-friction-values-for-common-materials/

Sep 2, 2011 ... The static and kinetic friction coefficient values reference table shown in this
article will be helpful for finding the COF values of commonly used ...

www.roymech.co.uk/Useful_Tables/Tribology/co_of_frict.htm

Jan 17, 2013 ... A table below shows approximate friction coefficients for various materials. All
values are approximate and are only suitable for guidance only.

www.tribology-abc.com/abc/cof.htm

Friction coefficients, table. ... Coefficient of friction for a range of material
combinations ... http://www.engineershandbook.com/Tables/frictioncoefficients.
htm

www.physlink.com/reference/frictioncoefficients.cfm

Coefficients of friction of various materials. ... Materials, Coeff. of Static Friction
Greek letter mu s, Coeff. of Kinetic Friction Greek letter mu k ...

www.finesoftware.eu/help/geo5/en/table-of-ultimate-friction-factors-for-dissimilar-materials-01/

Theory. Earth Pressures. Influence of Friction between Soil and back of the
Structure. Table of Ultimate Friction Factors for Dissimilar Materials. Adhesion of
Soil.

hypertextbook.com/facts/2005/steel.shtml

Friction is a resistive force that prevents two objects from sliding freely agaisnt
each other. The coefficient of friction (µ) is a number that is the ratio of the
resistive ...