Question

friction is necessary evil .Why?​

Answer 1

Friction a Necessary Evil. If there is no friction between any two surfaces in contact, then the present day civilization will be no more- as we cannot even walk properly on the earth. ... So friction is necessary. But too much friction causes a heavy loss of energy, wear and tear of machinery.

Answer 2

Answer:

Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction. ... Hence it is considered as a necessary evil