00:01
In the question we are asked about coefficient of friction.
00:07
What is coefficient of friction? basically, it is a measure of resistance that is r of two surfaces to sliding past each other.
00:28
When two surfaces slide with each other, the measure of resistance is mainly the coefficient of friction.
00:35
It is dimensionless quantity.
00:37
It is dimensionless quantity and calculated as ratio of frictional force, ratio of frictional force to the normal force to normal force between the two surfaces, between surfaces.
00:59
Now this coefficient of friction mainly depends, it mainly depends upon the nature of material, nature.
01:08
For example, like rubber and wood, rubber and wood coefficient would be different from metal and metal coefficient of friction.
01:22
Similarly, it also depends upon the roughness of surface, roughness of surface as due to roughness the friction would be different.
01:32
Also it depends upon the area of contact...