Force And Pressure

Question
A sharp knife cuts better than a blunt knife. Which of the following is the correct reason for this?
Options:
A. A sharp knife has a smaller contact surface area and hence applies less pressure.
B. A sharp knife is usually made of silver which is a strong metal.
C. A sharp knife has a smaller contact surface area and hence applies more pressure.
D. A sharp knife has a larger contact surface area and hence applies more pressure.

 Next Question
Answer: Option C
: C

A sharp knife has a lesser contact surface area than a blunt one. Lesser the surface area, greater will be the pressure. So, a sharp knife applies a greater pressure when it is used for cutting.This is why a sharp knife cuts better than a blunt one.

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