Is it true that a sharp edge knife is more effective in cutting than a blunt knife?

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True

False

answer is A.

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Detailed Solution

The above statement is True.
A sharp edge knife is more effective in cutting than a blunt knife because a sharp knife exerts force over a small area compared to a blunt knife. Thus, the pressure exerted by a sharp knife is more than that exerted by a blunt knife. So a sharp knife cuts quickly. From the definition of pressure, we know that force working on a unit area is called pressure. It is directly proportional to the force and inversely proportional to the surface area on which force acts. If the contact area increases, pressure decreases and vice versa.

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