[USMA:11337] Re: measuring mass

[Karl G. Ruling]

At 11:59 2/27/01 -0700, you wrote:
>I guess to be more precise, we could say that the grain elevators infer 
>the mass by measuring the weight.  It's hard (impossible?) to measure mass 
>directly.


You spin the unknown mass around a point at a set speed, and the 
centripetal force needed to make the unknown mass follow the curved path is 
a measure of the mass.

A balance beam also measures mass by comparing it with a known mass.