Question

It is easier to cut an apple with sharp end of knife rather than with its blunt end. Why?​

Answer 1

Explanation:

The sharp end of knife has much smaller area compared to its blunt end. Smaller area provides more pressure for the applied force. Hence, it becomes easier to cut an apple with sharp end of knife compared to with its blunt end.

Answer 2

Explanation:

Pressure is inversely proportional to the area of the surface. A sharp knife has a smaller area that comes in contact with the object and hence more pressure can be applied on the object. While a blunt knife has more area coming in contact than a sharp knife and the pressure exerted by the blunt knife will be less as compared to that of a sharp knife. Therefore it is easier to cut with a sharp knife.