Question

why does friction act?​

Answer 1

Answer:

Friction always acts to oppose any relative motion between surfaces. For the simple example of a book resting on a flat table, the frictional force is zero. There is no force trying to move the book across the table, so there is no need for a frictional force because there is nothing for the frictional force to oppose.

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Answer 2

Answer:

Hey Buddy!!

Here's your answer

Friction is a force that opposes motion between any surfaces that are touching.Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction.

I Hope it Helps you !!