Explain the importance of friction. Describe friction as a
‘necessary evil.
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Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. ... 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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friction always slows a moving object down. ... friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. when you walk, friction is caused between the tread on shoes and the ground. this friction acts to grip the ground and prevent sliding.
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