Question

Eg to show that friction is a necessary evil

Answer 1

Without friction we will not be able to walk. Nails would not stay in walls. Moving objects e.g. cars, would not stop if brakes are applied (cars would not move anyways if there was no friction, their wheels would rotate on the spot).


Hope it helps you...

Answer 2

friction has both effect good effect and bad effect good effect is that it helps in walking and bad effects is that it made unnecessary disturbance in our daily life works
so we can say that friction is a necessary evil
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