Question

Give three examples to illustrate that friction is a necessary evil.

Answer 1

Even though friction has some disadvantages, most of our daily life activities depend on the existence of friction. So, friction is a necessary evil. Some examples in which friction become useful are given below:

1. Frictional force helps us to walk on roads.
2. It is due to friction that we can write on board by chalk.
3. Friction is necessary to light a matchstick.