Thread: Why Rotate?

Originally Posted by BeBerlin

Pressure (symbol: p or P) is the total force acting across (not along) a surface divided by the area of the surface. And a razor's edge is microscopic.

So you are saying that when you push the edge against a hair the reaction force back on the blade from the hair is acting over a cross-sectional area that is micrometers thick... ok now I get it, so this stress with cause the blade to become more serrated like a bread knife?

Originally Posted by BeBerlin

There is for me, the main difference being feedback. A wedge will give you next to zero, because it does not flex, or sing. This caused me to apply more pressure initially ("Hm. Doesn't make a sound, doesn't really respond. Let's try harder. Ouch, that bleeds.").

So go easy on the wedge! got it!

Originally Posted by jbcohen

Hay, fat panda look at carriem's answer. I said that on purpose.

I don't understand what you are talking about...

Originally Posted by fatpanda

So you are saying that when you push the edge against a hair the reaction force back on the blade from the hair is acting over a cross-sectional area that is micrometers thick... ok now I get it, so this stress with cause the blade to become more serrated like a bread knife?

Either that, or God hates us all.