why friction is called a necessary evil explain with many examples
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because sometimes the friction is necessary but at the Same time evil also
friction is necessary for our daily activities such as walking, standing and writing
friction also helps to bring a moving vehicle to a halt by applying break
friction between the matchstick and Matchbox generate heat to ignite a matchstick
In some cases it is evil
due to friction, parts of machines get worn out and have to be replaced
friction between road and wheels of a moving vehicle can generate enough heat to damage the tyres
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