what is the cause of friction
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The cause of friction is the irregularities of the surface on which the mass ( body ) moves. Friction force always opposes motion i.e. if an object is moving to the right, friction force will act to the left.
kumarysunil:
you copied from anouther site right
The same definition was also given by my teacher. Don't know from where.
sorry
Its OK !!
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Causes of friction :-
♥ Adhesion is a molecular force that arises when two materials are brought close to each other .
♥ Surface roughness is a factor in friction when the materials are rough enough to cause serious abrasion .
♥ When one or more of the materials are relatively soft , much of the resistance to movement is caused by deformations or a plowing effect .
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