friction is a necessary evil. Justify
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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 .
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Answer:
friction is a necessary evil because friction allows a object to be on ground but if there is not friction gravity will take the object to float in air
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