Question

a sharp knife is more effective than a blunt knife???,

Answer 1

bcz pressure=force/area .if area will less then,force will expand that's why sharp knife is more effective than blunt knife
.

Answer 2

$\huge\texttt{Answer;}$

Pressure is inversely proportional to area. Sharp knife has a small area of contact than the blunt knife. Thus, a force will exert more pressure while using a sharp knife than while using a blunt knife.