Explain why it is easier to cut an apple with a sharp knife than with a blunt knife.

(N/A) Pressure is defined as force applied per unit area $(P = F/A)$. $A$ sharp knife has a very small surface area at its edge compared to a blunt knife. When we apply the same amount of force,the smaller surface area of the sharp knife results in a much higher pressure being exerted on the apple. This high pressure easily overcomes the structural integrity of the apple's skin and flesh,making it easier to cut.