| Subject: Re: My new mass, inertia project |
| From: gnygaard@nccray.com (Gene Nygaard) |
| Date: 28/12/2003, 14:17 |
| Newsgroups: sci.physics,alt.sci.physics,alt.sci.physics.new-theories,sci.astro.seti,alt.sci.seti |
"Paul R. Mays" <uce@ftc.gov> wrote in message news:<br-dnagvn_TPtXCi4p2dnA@giganews.com>...
clear the barrel... Since this is a .22 rim fire and the final
"weight" ( Weight as a measure of gravitational
interplay between two massive bodies... not mass ;) )
being 14 pounds, muzzle rise is not a factor.. Hell I
can hardly pick it up....
I see Paul Mays remains as confused as ever. "Weight" in this context
is mass. One clue is that not everybody measures this "weight" in
pounds; those who don't invariably measure it in kilograms, never in
newtons. The second is that 1 lb = 0.45359237 kg, exactly, by
definition.
Another clue is that the "weight" of the bullet and the powder in this
situation is also measured in units of mass, in either troy grains or
in drams. And the troy "units of weight," unlike their avoirdupois
cousins and unlike grams and kilograms, have never spawned a unit of
force of the same name; they are always units of mass.
American Society for Testing and Materials, Standard for Metric
Practice, E 380-79, ASTM 1979.
3.4.1.4 The use of the same name for units of force
and mass causes confusion. When the non-SI units are
used, a distinction should be made between force and
mass, for example, lbf to denote force in gravimetric
engineering units and lb for mass.
Gene Nygaard
"It's not the things you don't know
what gets you into trouble.
"It's the things you do know
that just ain't so."
Will Rogers