Question

Why friction is necessary evil? explain.

Answer 1

Without friction;

We can't walk.
We can't grip anything.
We can't stop anything in motion, like the tires of your car.
We can't do most things
So friction is not evil but necessary to us

Answer 2

Is 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 .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.