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

What is friction?

Rolling friction is:

Shown in the figure, the co-efficient of friction between the flor and the body B is 0.1. The co-efficient of friction between the bodie B and A is 0.2 A force F is applied as shwon on B. The mas of A is m/2 and of b is m. Which of the following statements are true?

A bend in a level road has a radius of 100 m.Find the maximum speed with which a car turning thi bend may have without skidding,if the co-efficient of friction between the tyres and the road is 0.2.

A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30^@ . The co-efficient of static friction mus = 0.25 :- How much is the force of friction acting on the cylinder ?

A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30^@ . The co-efficient of static friction mus = 0.25 :- What is the work done against friction during rolling ?