Question

define coefficient of friction. what are the factors on which coefficient of friction btwn two surfaces depend?

Answer 1

Frictional coefficient or coefficient of friction is a dimensionless quantity whose value is equal to the ratio of the frictional force between the surfaces in contact and the force pressing them together (which is also the normal force).

Coefficient of friction = Frictional force/Normal force

Dependence of coefficient of friction

a. Type of substance in contact.

b. Temperature of surfaces in contact.

c. Roughness of the surfaces in contact.

d. Velocity of the surfaces in contact.