Question

The force of friction is due to the _____________ of surfaces of the bodies in contact . The answer is not roughness

Answer 1

Answer:

Friction depends on the nature of the two surfaces. It depends on smoothness or roughness of the two surfaces which are in contact of each other. When two surfaces are in contact are smooth, then the friction between them is small because the interlocking of smooth surface is less. When two surface is rough then the friction is more because the interlocking is very strong in very rough surface.

Answer 2

Explanation:

Causes of friction:

When one body is placed in contact with another body there will be interlocking of a large number of irregularities. Many points of contact between A and B get cold-welded due to a high pressure at sharp points. The phenomenon is called surface adhesion.....

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