someone please clarify something for me:
i'm using aip2009
the physical properties tab has the a.s. MASS units as 'lbmass'
why is it called 'mass' when it is actually WEIGHT?
this is how i understand the units related to this:
a of g = 32.2 ft/sec^2
slug = avd. lb (with no a. of gravity)
lb = a of gravity x slug
lbmass = 1/32.2 x slug
if this is right, then why does inventor call lbmass = WEIGHT?
are they re-defining the international standard in their own terms?
also, on the physical properties tab, what exactly does AREA define?
does it take the sum total of EXTERNAL surfaces of an assembly, while disregarding the INTERNAL surfaces of hollow bodies?
... chris
... Chris
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