Compare the force necessary to keep an object sliding compared to the force necessary to start the slide. What does this say about the coefficient of kinetic friction compared to the coefficient of static friction?
2006-10-18 06:35:07 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
look, when we have to move a body, we have to cope up with two things --- 1) the interlockings between the surface of the object and the ground
2) to break the cold welds(these r bonds between the two surfaces in contact--as if points stuck by an adhesive)
when we bring a body in motion, we break the cold welds and due to motion they do not get time enough to reform again. thus in sliding friction one of the two factors to be overcome gets finished. hence,we need more force to make an objest START to slide than to keep it sliding
2006-10-18 07:05:39 · answer #1 · answered by catty 4 · 1⤊ 0⤋
Usually the force of static friction is greater than the force of dynamic friction.
2006-10-18 14:19:47 · answer #2 · answered by Randy G 7 · 1⤊ 0⤋