Give reasons as to why friction is necessary evil.
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Friction force causes of lot of losses in general unkeep and wear and tear of machinary
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Friction is a necessary evil because it is needed in our daily life but it also causes tear and wear, blast of machines due to heat. Friction produces heat and makes a surface rough. It also produces heat that when becomes over causes the machinery to explode . So we conclude that friction is a necessary evil.
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