Question

Force of friction is more in​

Answer 1

Answer:

On rough surfaces, there are a larger number of irregularities. So the force of friction is greater if a rough surface is involved. We see that the friction is caused by the interlocking of irregularities in the two surfaces. It is obvious that the force of friction will increase if the two surfaces are pressed harder.

Answer 2

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Force of friction is more on rough surfaces.