Question

Give reason for a sharp knife cuts vegetables and fruits more effectively than a blunt knife

Answer 1

It is because area of cross section of blunt knife is more than sharp one .As area of cross section is inversely proportional to pressure.

Answer 2

Area under pointed end of the sharp knife is very small as compared to the area under blunt knife.

So, pressure exerted by the blunt knife is more than pressure exerted by the sharp knife.

So, a sharp knife cuts vegetables more effectively than a blunt knife.