Question

why are nails broader at the top and narrower at the bottom​

Answer 1

Answer:

The nails are broader at top and narrow at bottom because the area of an object is inversely prportional to pressure

Explanation:

That is why nails are pointed at bottom so that less pressure would be needed to hammer the nail into wood

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Answer 2

Answer:

its just the way your finger is.

not every nail is narrower at the bottom. some can be more narrow at the top and wider at the bottom. Also some people can shape their nails to their desire length, shape etc.  so. the it just doesn't specify to one person. everyone has different finger shapes!

Explanation:

hope this helped :D