9. Friction is a necessary evil - Explain with your views.
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Explanation:
Yes, friction is a necessary evil. While friction is useful while we walk, write, play, run, etc but it can also be harmful to us like fire accidents, wear and tear. Let’s find out the explanation with examples and valid justification. Heating effect of friction: The heating effect of friction is a necessity for us to light matchsticks.
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Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. ... But almost all crucial tasks cannot be carried out without the presence of friction. Basic activities like walking and writing on a surface are possible due to friction. Hence it is considered as a necessary evil .
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