Question

(b) A sharp knife is more effective than a blunt knife. Why?​

Answer 1

Answer:

Sharp knife has a small area of contact than the blunt knife. Thus, a force will exert more pressure while using a sharp knife than while using a blunt knife.

Answer 2

Answer:

A sharp knife cuts objects easily because due to its very thin edge, the force of our hand falls on a very small area of the object producing large pressure.