give examples to show that frictionis both the friend and a foc
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Examples of friction as a friend: We are able to walk because of frictional forces between ground and our feet. We are able to write because of friction between ball point and the paper surface. nails and screws stick to the wall surfaces because of friction.
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friction as friend:-
friction helps us to move
we are able to hold objects just because of the presence of friction
friction prevents vehicles from slipping off on a curved road
friction as a foe:-
it causes wear and tear
it damages machine parts
it causes wastage of energy
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