Question

'Friction is a necessary evil' comment.

Answer 1

friction is very important for our life but it has side effect also for eg. our shoes,sandles, machines,tyres of vehicles etc become useless after sometime because of friction.that why friction is necessary evil.

Answer 2

friction is necessary in our daily life..for eg without friction we cannot hold objects in our hand.. we canot walk... some time friction is not desirable..for eg friction between machinery parts which cause wear and tear..friction have advantages and disadvantages..