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

Friction coefficients, table. ... Coefficient of friction for a range of material
combinations ... The coefficient of friction between two materials in relative sliding
may ...

www.zx52.com/table-of-coefficients-of-friction.html

For any specific application the ideal method of determining the coefficient of
friction is by trials. A short table is included above the main table to illustrate how
...

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.

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 ...

engineering.nyu.edu/gk12/Information/Vault_of_Labs/Physics_Labs/static and kinetic friction.doc

Table 1[1, 2] has typical values of static and kinetic friction for different material
combinations. Note that the static coefficient of friction is higher than the kinetic ...

itll.colorado.edu/modular_experiments_dir/itll_modules/Unbalanced Wheel/frictioncoefficients.htm

For any specific application the ideal method of determining the coefficient of
friction is by trials. A short table is included above the main table to illustrate how
...

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 ...

www.school-for-champions.com/science/friction_coefficient_values.htm

Nov 18, 2016 ... Coefficient of Sliding Friction by Ron Kurtus - Succeed in Understanding Physics:
School for Champions.