Question

फ्रूट्स can easily be cut with a sharp knife why does it happen

Answer 1

$pressure = \frac{force}{area}$
since area of knife decreases so on same force more pressure applied.
due to this reason fruits can be easily cutter by sharp one instead of blunt.

Answer 2

sharp knife has a very small.area of contact with the fruits thus more pressure per unit are which will cut fruits more easily