Re: Conservation of angular momentum

On May 30, 9:33 am, "Androcles" <Engin...@xxxxxxxxxxxxxxxx> wrote:
"Peter" <Poakfi...@xxxxxxx> wrote in message

news:1180530011.727104.99660@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
: On May 29, 6:17 pm, "Androcles" <Engin...@xxxxxxxxxxxxxxxx> wrote:
: > "Peter" <Poakfi...@xxxxxxx> wrote in message
: >
: >news:1180473737.432104.129570@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
: > : On May 29, 3:16 pm, "Androcles" <Engin...@xxxxxxxxxxxxxxxx> wrote:
: > : > "Peter" <Poakfi...@xxxxxxx> wrote in message
: > : >
: > : >news:1180465682.130652.273010@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
: > : > : On May 29, 1:56 pm, "Androcles" <Engin...@xxxxxxxxxxxxxxxx> wrote:
: > : > : > "Peter" <Poakfi...@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/angularmomentumis 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? :-)
: > : > :
: > : > : I am not Pokefield; you got that wrong too.Angularmomentumin other
: > : > : than circular orbits is not conserved.
: > : > :
: > : > Oh yes it is. Linear/angularmomentumis always conserved. How does
that
: > : > work then, Pokefun? :-)
: > :
: > : Are you funny! :-)
: >
: > Yes!, of! course! I! am!, I! added! a! smiley! to! show! I! was!. Would!
: > you! like!
: > an! exclamation! mark! as! well!?
: >
: > My apologies for getting your name wrong, Pokefield sounds just like
: > Poakfield
: > where I live, although I understand that in Western Pennsylvania vowels
are
: > added, "hand" is pronounced "he-and".
: >
: > Now let's get back to the more serious (sorry, sear-E-us) subject, you
need
: > not answer a question with a question.
: > I said:
: > Oh yes it is. Linear/angularmomentumis always conserved. How does that
: > work then, Pokefun? :-)
:
: Linear andangularmomentumare both vectors, true vectors. Don't you
: think they are, or should be?

Velocity is a vector, mass is not.
http://www.androcles01.pwp.blueyonder.co.uk/Vector/Vector.htm

: My name is P. Oakfield. What is yours?

My name is Androcles.
I was addressing my remarks to Poakfi...@xxxxxxxx
If you are not Peter Poakfield you should not be responding
as if you were. :-)
A word to the wise: You are leaving yourself wide open to spam
and even junk mail by displaying your email address, it is "read" by
"robots", programmes which search for "@" and then list names
for sale to advertisers. Do as others do and disguise your email address
or leave it out altogether.

You must be the only Androcles who ever lived. Glad to meet you.
Thanks for the advice regarding my e-mail. Now, back to business. O.
K., velocity is a true vector, what about angular velocity? tangential
velocity?

Peter


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