Is the surface area bigger or smaller on a sharper nail?

Answer 1

The surface area of a sharper nail is technically smaller compared to a dull nail of the same size. This is because a sharper nail has a more acute tip, which reduces the area of contact with the material it is penetrating. In contrast, a dull nail has a blunter tip, resulting in a larger surface area in contact with the material.

Answer 2

A sharp point has a smaller area than a blunter point. That is, essentially, what sharpness means.