Question

Why does a sharp knife cut easily than a blunt knife?

• A. The area of contact of sharp knife is small
• B. Cannot be explained
• C. It doesn’t depend upon area
• D. The area of contact of blunt knife is small

Answer 1

The correct option is A The area of contact of sharp knife is small

The area of contact of the sharp knife is smaller than the blunt knife. Since, the pressure is inversely proportional to the area of contact, more pressure is applied by sharp knife then the blunt knife. Thus, the sharp knife cuts easily.