Question

It is easier to cut fruit with a sharp knife than with a blunt knife

Answer 1

It is because on cutting with sharp knife we apply less effort so it gets cut easily. In case of blunt knife we need to apply more effort.

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.