Question

why it is difficult to cut vegetables With blunt knife

Answer 1

In the case of a blunt knife, the cutting edge is thicker. That means, the area is larger. As a result, the force of our hand falls over a larger area of the knife, producing lesser pressure.

Answer 2

Let me explain by an example, try to poke a hole in a paper with the tip of your pen and then with the other end of your pen. You will see that tip pearces easily because it has smaller cross sectional area and thus applies greater force as compared to fat end of pen for the same given force.


Similar is the case with blunt knife, a blunt knife and more cross sectional area as compared to sharp knife. The blunt knife apples less pressure as compared to sharp knife for same given force.