Question

Why a sharp knife cut better than a blunt knife

Answer 1

A sharp knife has a very thin edge to its blade. A sharp knife cuts objects betterbecause due to its very thin edge, the force of our hand falls over very small area of the object producing a large pressure. And this large pressure cuts the object easily. On the other hand, a blunt knife has a thicker edge.

Answer 2

because the pressure exerted by sharp knife is high because of small surface area