Explain with 4 examples - Friction a necessaryevil
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Explanation:
friction is said to be a necessary evil because it is useful as well as harmful. friction helps us to walk, write, hold things, lift objects. So it is necessary in our lives. Without friction many essential processes can not be done. On the other hand, it is also necessary at times. it sometimes results in loss of energy, wear and tear of parts of machinery, due to which it also damages things. so it is an essential evil.
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Explanation:
friction is used in gripping , holding objects with our hands, climbing a ladder or a Tree e.t.c. 2) it is responsible for wear and Tear of various part of Machines. it also wears our materials like screws ,bell bearing or soles of shoes . I hope that it will helps you
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