Courses
Courses for Kids
Free study material
Offline Centres
More

# How does the roughness of surfaces that are touching affect the friction between the surfaces?

Last updated date: 22nd Feb 2024
Total views: 339k
Views today: 3.39k
Frictional force or frictional resistance is directly proportional to the force that is applied to the two surfaces. It also depends upon the roughness of the surfaces. The rougher the surfaces, the greater the resistance. The friction comes into the picture when two surfaces move against each other in opposite directions. The resistance offered by friction depends directly on the force applied for the relative motion between the surfaces. It is always calculated as vertical or normal force and it also depends on the roughness of the surfaces, it is represented as the coefficient of friction ($\mu$). Lower the value of $\mu$, smoother the surfaces and the lesser will be the resistance; more the value of $\mu$, rougher the surface and thus more the resistance.