Question

A sharp knife cuts easily than a blunt knife by applying the same force

Answer 1

Pressure= Force/Area

Since the tip of a sharp knife has lesser area than that of a blunt knife, there is more pressure experienced by the tip of the sharp knife compared to that of the blunt knife, therefore, it cuts more easily.

Answer 2

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Pressure is inversely proportional to area. Sharp knife has a small area of contact than the blunt knife. Thus, a force will exert more pressure while using a sharp knife than while using a blunt knife.