Why Do Knives Cut
why does a sharp knife cut better then a dull knife?
this has to do with physics class
and pressure, and frictions
these topics lol
When using a knife, you put the knife on a surface that needs to be cut, and then you apply a force on the knife. This force that you are applying on the knife puts pressure on the knife, which also puts pressure on the thing that’s being cut.
When you rest the knife on the cutting surface, without applying force, only a certian portion (A) of the total area of the blade touches the cutting surface.
The sharper a knife, the smaller the area (A) of the knife.
P = F/A
According to the formula above for pressure, the smaller the area (A), the greater the pressure that can be exerted.
Since the area (A) corresponds to the sharpness of the knife, the sharper the knife, the greater the pressure that can be exerted. This makes it easier to cut things.
“Little Big Knives” Cut Tests
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