Question

What are the two factors that affect friction?

Answer 1

Factors affecting force of friction

Two factors which directly affect the force of friction are as follows:

i. Roughness of the surfaces in contact with each other .

Higher the roughness of surfaces in contact with each other, greater is the friction between  bodies. Force of friction will be less between smooth surfaces.

ii. Weight of the sliding/ rolling body: Greater the weight of the moving body on the surface, more is the force of friction on the body by the surface.