why it is easier to cut fruits with sharp knife rather than with the blunt knife
the edge of knife is sharp, apple can be cut easily without much effort. This is because, area of the sharp edge is highly minimized which causes a very high pressure on the apple. On the other hand in case of blunt knife, even a good effort may go futile as the pressure applied by its edge may not be sufficient to cut the apple.
it cuts better because it is sharper. the force exerted on it is greater than it would be if it was blunt.
The area on the tip of the blade is small meaning the pressure exerted is all at the end of the tip making it easier to use. (the force on both knives is the same)
The blunt knife has more area hence the pressure exerted is less while the shart knife has less area hence the pressure exerted is more
This is why it is easier to cut a fruit with a sharp knife