why friction is called a necessary evil?

Dear Student

The answer for this lies in the question itself because friction is  necessary as well as not required sometimes.

wear and tear of machines happen because of friction but then tyres are made rough to increase friction.

Hope this satisfies your doubt........


  • 11

friction is a necessary evil, because it reduces the efficiency of the work done ( usually by converting most of the energy into heat energy) but at the same time is also vey useful in our life. You are able to walk just because of friction!

  • 0

 friction is called as necessary b'coz its the the evil which is necessary also  bcoz  it makes grip on the road so without grip our car or bike will skid away there will be accident and it is called as evil b'coz of friction we have to more energy in driving ,walking running

  • 3
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