Quote:
Originally Posted by Jibri Wright
It is possible to have something with a greater coefficient than one? I honestly didn't think its possible mainly because anything greater one would mean you get more force out than you put in. Because the force of friction=Fn*coefficient of friction. Friction can only oppose up to the magnitude of the force being applied. If the magnitude of the force of friction were greater than the force it opposed, that would mean that friction itself was causing one or both of the surfaces to accelerate. I did not think that was possible since it breaks the law of conservation.
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There are other cases besides friction where you can "get more force out than you put in". Gears are an excellent example of this. The important thing to remember is that there is no "law of conservation of force". The important conservation laws are those of mass, momentum, and energy.
The other tricky thing with static friction is that the
maximum force that static friction can provide is your stated equation. Static friction can always provide less force than this, but never more. If the applied force is less than the maximum force from static friction, then the force from static friction will be equal and opposite to said force.
Anyway, you probably knew most of this anyway. It is still a good refresher for me though.
Since this is a thread about ball damage...um...don't use spikes to get a greater CoF.