Question

Friction is necessary evil why?

Answer 1

It is a general misconception that friction always opposes motion between two bodies in contact ,but actually it opposes relative motion between two bodies in contact .In many cases friction is found as the cause of motion .Friction helps us to walk, write, hold things, lift objects. So it is necessary for our lives. Without friction, many essential processes can not be done. Without friction it is impossible to imagine this world. Friction is evil in mechanical machines causing wear and tear of parts. Friction causes wear and tear of tyre but in turn is impossible to rotate tyre…and many more. Therefore friction is a necessary evil.