Question

why friction is necessary evil?​

Answer 1

Answer:

Friction causes wear and tear in machinery parts and also cause wastage of electricity and energy. Friction causes moving objects to stop or slow down. Friction produces heat causing wastage of energy in machines. Friction causes wear and tear of moving parts of macinery, soles of shoes, etc.

Answer 2

Answer:

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Explanation:

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 .