- #1
ktpr2
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I'm going through my intro to mechanical engineering material and there was one thing I was never clear on:
If you have a cross section of a rod, why isn't its' area at a cross section [tex]pi * r^2[/tex] as a opposed to [tex]piD^2/4[/tex], where D is the diameter?
If you have a cross section of a rod, why isn't its' area at a cross section [tex]pi * r^2[/tex] as a opposed to [tex]piD^2/4[/tex], where D is the diameter?