Re: Conservation of angular momentum


"Peter" <Poakfield@xxxxxxx> wrote in message
news:1180435048.425136.40890@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
: On May 28, 4:30 pm, "Androcles" <Engin...@xxxxxxxxxxxxxxxx> wrote:
: > "The Ghost In The Machine" <e...@xxxxxxxxxxxxxxxxxxxxxxx> wrote in
messagenews:kitpi4-4tp.ln1@xxxxxxxxxxxxxxxxxxxxxxxxxx
: > : In sci.physics, Peter
: > : <Poakfi...@xxxxxxx>
: > : wrote
: > : on 27 May 2007 17:03:26 -0700
: > : <1180310606.157491.120...@xxxxxxxxxxxxxxxxxxxxxxxxxxx>:
: > : > On May 27, 7:29 pm, "Androcles" <Engin...@xxxxxxxxxxxxxxxx> wrote:
: > : >> "Peter" <Poakfi...@xxxxxxx> wrote in message
: > : >>
: > : >>news:1180306672.918013.327500@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
: > : >> :Momentumis mv, and it may be rectilinear or curvilinear. In
: > : >> : rectilinear motion, its direction does not change, of course; in
: > : >> : curvilinear motion, it changes continuously. There are many
systems
: > : >> : (machines) where mv changes from rectilinear to curvilinear and
vice
: > : >> : versa. We cannot callmomentumthings that are not mv; we should
call
: > : >> : them something else.
: > : >>
: > : >> Yes, you have a point.
: > : >>Angularmomentumis called... err... wait, it's coming... err...
: > : >> it's on the tip of my tongue, bear with me... err... let me
think...
: > : >> err... yes, I have it...it's called "glosipnurt", Pokefield.
: > : >> That makes it different to "momentum", it is "something else".
: > : >>
: > : >> Really, whether one calls a football a ball or a dance a ball, a
ball
: > : >> is a ball is a ball. "We" should call it a ball, and "we" do.
: > : >> "You" need to learn what "we" mean, Pokefield, "we" are not
: > : >> changing English to suit other people, but just for you (as a
: > : >> very special person),angularmomentumis called "glosipnurt"
: > : >> by my decree.
: > : >> Please refer to non-mv as glosipnurt in future correspondence.
: > : >
: > : > Sorry. You missed the point.Angularmomentumis correct: it is the
: > : >momentummv of an object whose motion is not rectilinear.
: > :
: > : Erm....isn't it more like I * omega, where I is the moment of inertia
: > : and omega the rotation speed?
: > :
: > Wow... that might work. Now, what about this comet?
: >
: > http://www.orbitsimulator.com/gravity/articles/sl9.html
: >
: > Is it gaining or losingmomentum?
:
: Linear/angular momentum is always conserved.

Mass remains constant, velocity changes in any Keplerian orbit
with eccentricity > 0. The comet's glosipnurt changes, therefore it
isn't conserved. How does that work then, Pokefield? :-)



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