Article View: sci.physics
Article #14420Re: Where is the Centre of the Universe?
From: tussock
Date: Sat, 12 Apr 2008 09:37
Date: Sat, 12 Apr 2008 09:37
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3001 bytes
tadchem wrote:
> You can't move away from yourself or towards yourself. Therefore you
> have no kinetic energy.
Well, that's true instantaniously, but you can always accelerate.
> Everything else that is moving is moving towards you, or away from you,
> or around you, giving it kinetic energy and momentum and angular
> momentum, but only relative to you.
You can have angular momentum; it's the bit that makes your arms
extend away from your body, and gives the earth it's buldge. You also get
it for orbits, as long as you've got enough information to find a
barycentre.
> If you grab something and hold it, you take its kinetic energy and
> momentum and angular momentum away.
Sort of. It accelerates you into a different reference frame, but
then you're both instantaniously at rest again in that new frame.
> Obviously you yourself are the center of the entire universe.
/Very/ locally, though patterns of acceleration suggest other centers
that may be more appropriate for various purposes.
> (This analysis has brought to you by my teenage daughter.)
C-. Oh, wait, highschool. B-.
--
tussock
I'm like a box of chocolates; you never know what you're gunna get.
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