friction is a necessary evil . explain pls .
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friction is necessary evil because by it we can walk on the floor,write on the board ,break the car .
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it is necessary because due to friction we are able to stand without slipping, every object comes to rest position after traveling certain distance
but it has it's own disadvantage it cause damages to the machine parts, soles of the shoes etc.
it also produce heat
but it has it's own disadvantage it cause damages to the machine parts, soles of the shoes etc.
it also produce heat
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