Question

Friction is necessary evil.explain the statement by giving example

Answer 1

Without friction we cannot set out the bodies in motion or stop the moving bodies. Thus friction is absolutely necessary for carrying day to day activities. On the other hand, it also wastes the time and energy, brings about wear and tear and slows down the motion. Thus, we can say that friction is a necessary evil.

Answer 2

friction is a necessary evil
advantages
1. with friction we can able to move
disadvantages
1. friction cause loss in energy
2.the overall force is less so net force is applied on the object is less