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It depends upon the roughness of the surfaces. (Talking about friction, it only depends upon weight of objects and not on area in contact.)
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factors on which coefficient of friction depends--
1. roughness of the surface 
2 .mass of the body
3 .area of contact
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plz mark brainlest
It doesn't depend on area of contact
and also, it doesn't depend on mass
Its coefficient of friction, NOT just friction
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