Question

Frictional force depends on:

• A. roughness of the surfaces
• B. shape of the surfaces
• C. colour of the surfaces
• D. area of the surfaces

Answer 1

The correct option is A roughness of the surfaces

Friction is a force that opposes the relative motion between two surfaces in contact. The cause of friction is the interlocking within the irregularities of the two surfaces. As the interlocking is more in rough surfaces, friction is on these type of surfaces. Hence, friction depends on the roughness of the surface.