The frictional force works to inhibit relative motion between two surfaces when they are in contact. The body can move relative to the surface when the applied force is higher than the frictional force between the two surfaces.

Frictional force is denoted by the formula f = μN. ————- (1)

Where f is the frictional force, μ is the coefficient of friction, and N is the normal force acting between the two in contact surfaces.

When the contact surface is smooth, the coefficient of friction is lower. The value of the coefficient of friction rises as the roughness of the two surfaces rises. Friction is exactly proportional to the coefficient of friction, as seen in Equation 1.As a result, the coefficient of friction varies as well. As a result, friction is determined by the nature of the surfaces in contact. As a result, the statement is incorrect, because friction is determined by the type of the surface with which it comes into contact.