Question

Explain, why a sharp knife cuts more easily than a blunt knife?

Answer 1

1. 
2. A sharp knife has a smaller contact surface area and hence applies more pressure.
3. We know that pressure is inversely proportional to the area of the surface in contact.
4. A sharp knife has a lesser contact surface area than a blunt one, so, a sharp knife applies a greater pressure when used for cutting.
5. This is why it cuts better.