Keys and MOI - wipp assist

[Don A. Gilmore]

----- Original Message ----- 
[link redacted at request of site owner - Jul 25, 2015]
To: "College and University Technicians" <caut@ptg.org>
Sent: Thursday, January 08, 2004 10:36 PM
Subject: Re: Keys and MOI - wipp assist


> > Actually it would be a factor of 100,000.  There are 1000 grams in a
> > kilogram, but there are only 100 centimeters in a meter.
>
> Don,
>
> If we have a 1000gms rotating in a circle with a radius of 100 cm it has
> a MOI of 10,000,000 gm cm^2? is this not the same as 1kg m^2? So the
> factor would be 10,000,000?

Oops.  I forgot the centimeters were squared.  You originally said 1,000,000
and I assumed you were thinking in 1000's (like anyone else not living in
the 1800's).  Now you're absolutely correct.  If you square the 100 you get
10,000, then multiply by 1000 and you get 10,000,000.  Sorry for the
confusion.

Don A. Gilmore
Mechanical Engineer
Kansas City