Question

two rough surface in contact are made smotther by polishing . does the friction between the two increase or decrease​

Answer 1

Answer:

If the surfaces that are in contact are rough, there is more friction. Hence to reduce friction, the surfaces in contact are kept smooth and polished. It is worth noting that if the two surfaces in contact are of the same metal, the friction increases on polishing the two surfaces.

Explanation:

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Answer 2

Answer:

The friction decreases.