Question

why friction is a necessary evil ​

Answer 1

Answer:

Friction is a necessary evil because it is required in our life in some situations whereas, in some not.

Explanation:

Friction is necessary:

1) We need friction for walking. If friction is not there, we will be not able to walk, or run.

2) Friction is needed for a wheel to roll on a surface. If friction is not there, Wheel of a vehicle will be moving in one place only.

Friction as an evil:

1) Friction produces heat. This heat when released gets wasted.

2) Friction is responsible for many wear and tear in the moving parts.

Hence, we got to know that Friction is a necessary evil.

Answer 2

Answer:

it stops the stopping object