Question

11.Friction is a necessary evil. Explain.

Answer 1

Answer:

Friction force causes lot of losses in general keepup and wear and tear of machinery . hence it is called as evil..

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Answer 2

Answer:

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 .