friction is necessary evil. justify.
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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. ... Without friction many essential processes can not be done. On the other hand, it is also unecessary at times.
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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. ... Without friction many essential processes can not be done. On the other hand, it is also unecessary at times....
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