Question

A sharp knife cuts better than a blunt knife. Which of the following is the correct reason for this?

• A. True
• B. False
• C. A sharp knife has smaller contact surface and hence applies more pressure
• D. A sharp knife has more surface area and hence applies more pressure

Answer 1

Answer: (C)

A sharp knife has smaller contact surface and hence applies more pressure

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.