Question

draw the diagram of effect of roughness on frictional force and write a note on relation between roughness and frictional force

Answer 1

the company has been working with the rest of its business

Answer 2

Answer:

Frictional force resists motion or tendency of motion. It depends on the roughness of the surface and area of contact. The roughness of any surface  is determined by the hills and valleys which occurs at microscopic level.

The hills and valleys of one surface interlock with the hills and valleys of other surface and resist the motion.

More the roughness and area of contact, more would be the friction. Friction always acts parallel to the surface opposite to the direction of motion.

Coefficient of friction determines how rough a surface is.