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Friction is necessary evil

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Friction is necessary evil

Posted by Simranjot Singh Khatrao 7 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Prince Jaat 7 years, 10 months ago

Friction is known as a nesssary evil because it helps as --we would not be able to walk without friction --without friction we would slip --the brakes of the vehicles also work by friction it causes problems as --it wears out thematerials wheter they are screws, ball bearings ors soles of shoes --because of wearing out of these materials we have to buy things again and again

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