I would like to know why dry frictional force does not depend on speed(assuming that the heat generated by friction is small so it does not alter the coefficient of friction).
Let me explain how I think about dry friction. When I slide one object on another than their small irregularities on surfaces are bashing to each another and this causes the friction. If I higher the sliding speed than those irregularities will bash to each other more frequently so it seams to me that the friction should rise. But Coulomb's friction force says that the force does not depend on speed.
So can anybody give me intuitive explanation why is that?