Question

Friction a nessary evil. justify

Answer 1

because without Friction
we cannot move.
we cannot write on the board .
we cannot stand straight.
the brakes of automobiles Cannot applied and so on

Answer 2

friction is the necessary evil because without friction we can't do anything even we cannot walk but this have side effects also eg. when we use rubber Tyre after sometime it become thin because of friction and parts of machinery also become useless after sometime we have to replace it or repair it and our shoes and slippers become useless after sometime and than we buy new shoes or slippers because of friction and also accident on the roads happen because of friction so we can say that we need friction but this also have side effects also in our life that's why we say friction is necessary evil.