Question

Friction is unnecessary evil example

Answer 1

Answer:

Friction is a necessary evil and not a n unnecessary one

Explanation:

It means it has advantage as well as disadvantage

In other words, friction is not desirable but without friction, we cannot think of survival

Examples:

Disadvantage :-

1.a significant amount of energy of a moving object is wasted in form of heat energy to overcome the force of friction

2.force of friction restricts the speed of moving vehicles

3.efficiency of machines decreases due to presence of force of friction

Advantage :-

1. friction helps to move on the surface of the earth (like walking)

2.helps in applying brake

3.helps us to write on paper