Question

A sharp knife cuts objects more effectively than a blunt knife?
Give reasons. ​

Answer 1

Answer:

A sharp knife cuts objects better because due to its very thin edge, the force of our hand falls over a sharp small area of the object producing a large pressure. ... A blunt knife has a thicker edge and does not cut the object easily.

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Answer 2

More surface area = less pressure

Less surface area = more pressure

A sharp knife cuts object more effectively because the surface area of knife is less so the pressure applied is more.

A blunt knife has more surface area so pressure applied is less..

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