Coefficient of friction depends on

What is the relation between coefficient of friction and angle of repose?

A block of mass 1 kg is pushed up a surface inclined to horizontal at ang angle of 30^@ by a force of 10 N parallel to the inclined surface in the figure. shows . The coefficient of friction between bock and the incline is 0.1. If the block is pushed up by 10 m along the incline, calculate work done against force of friction

Co-efficient of friction has no .............. .

What is the relation beteen coefficient fo friction and angle of friction (phi) ?

How does coefficient of friction is altered when the weight of body is doubled?

The triangular block is moving on a frictionless surface with 3 m//s^2 towards right such that the mass m does not slide on the tiangular block.Find the coefficient of friction between mass m and the block. .

A bend in a level road has radius of 100 m.Find the maximum speed with which a car turning this bend may have without skidding ,if the coefficient of friction between the tyres and road is 0.8.