Question

How can you support your answer with a statement"friction is a necessary evil,it creates energy crisis to biodiversity and how can you solve this problem

Answer 1

Friction plays a very important role in our daily life. Many of our daily activities depend on the presence of frictional force. In some cases, friction is useful and necessary. In other cases friction causes a wastage of energy and damages moving parts of machinery, etc. It is, therefore, harmful and an evil or nuisance in such situations.

Friction - An Evil or Nuisance

(1) Friction consumes a substantial part of the useful energy available to us. As friction opposes the relative motion between two objects in contact; some of the effort applied to the moving object is moving object is wasted in overcoming friction.

(2) A significant amount of energy, supplied to a machine, gets wasted in the form of heat energy while overcoming the force of friction.


Friction - A Necessity

(1) When we are walking on the ground it is friction between the ground and our feet (shoes) that enables to walk.

(2) Whenever we write with pen or pencil on paper, or with chalk on a blackboard, it is friction that holds the ink/chalk particles, and makes them stick to the rough surface of paper/blackboard.




Hope it helps you.
With regards@
Tanisha

Answer 2

Answer:

Friction is useful and necessary. In other cases friction causes a wastage of energy and damages moving parts of machinery, etc. It is, therefore, harmful and an evil or nuisance in such situations: