Ok so i have looked and looked for a simple way to under stand how to find drag using the coefficient of drag.(adsbygoogle = window.adsbygoogle || []).push({});

the formula i found is off of NASA website and it reads

Drag = Coefficient * [ (Density * Velocity ^2)* .5 ] * reference area

here is my question

what units do i use.

When i set it up with these numbers

CD = 0.31 (unitless i know)

Ref Area = 8 sq ft (ruff guess)

Velocity = 75 fps

density = 24 in Hg

I end up with 167,400. but i know no clue as to what unit that is? should i be putting every thing in with different units... what is the end units?

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# Understanding Cofficient of Drag

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