Question

Why is it easier to cut the objects with a sharp knife?

Answer 1

Answer: Sharp knifes have smaller surface area.

Explanation:

Since pressure= f/a, a smaller surface area due to sharp knife requires a smaller force to be applied given a constant pressure was applied to the object.

Answer 2

Answer:

It easier to cut the objects with a sharp knife because the pressure is high on the edge of the knife

Explanation:

It is easier to cut the objects with a sharp knife because the pressure exerted by the sharp knife is larger than the other blunt and the force is exerted by the knife-edge whose area is very low by which the sharp knife can easily cut the objects.

The sharpness of the knife is very sharp therefore if we applied the less force on it then it will cut the objects easily and sometimes it may be cut our hand with the sharp knife.