Does frictional force depend on surface area?

Although a larger area of contact between two surfaces would create a larger source of frictional forces, it also reduces the pressure between the two surfaces for a given force holding them together. read more

Since pressure equals force divided by the area of contact, it works out that the increase in friction generating area is exactly offset by the reduction in pressure; the resulting frictional forces, then, are dependent only on the frictional coefficient of the materials and the FORCE holding them together. read more

Frictional force is not dependent of the surface area. It is dependent of the normal force (on plane surface, it’s weight). And the nature of the surface (rubber, plastic, etc). read more

If the load R is constant and the area is varying then in coulomb friction the frictional force would not vary. In Coulomb friction $\mu$ is a constant. If you look in more detail than Coulomb friction then $\mu$ does change with the area of contact, a lower area causes lower friction. read more

Friction does not depend upon the apparent area of contact but depends very much on the real area of contact. This can be explained easily - When pressure acts upon two surfaces in contact (maybe due to weight) and the surfaces have relative motion, the lateral friction force tends to shear the crests on the respective material surfaces. read more