Subject:
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Re: Relativity Question
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Wed, 8 Nov 2000 21:27:54 GMT
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Viewed:
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587 times
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On Wed, Nov 08, 2000 at 09:20:41PM +0000, Matthew Miller wrote:
> Yeah, that's what I don't get, as well. The terms "inertial" and
> "noninertial" come from the britannica article, and they mean
> "non-accelerating motion" and "accelerating motion". But I'm not sure how to
> tell which is which without an absolute frame of reference.
acceleration _is_ absolute - you can measure it, you can tell when your
speed is constant. you _cannot_ tell what that speed really is though.
not without a point of reference.
> Or: what's the difference between a ship accelerating away from the earth,
> and the earth accelerating away from the ship? Just because one happens to
> have the motor....
if the earth started accelerating, everyone and everything on it will
feel it. the motor applies the force to the ship, therefore the ship
is accelerating. you don't speed up without a force pushing/pulling you.
--
Dan Boger / dan@peeron.com / www.peeron.com / ICQ: 1130750
<set:9133_1>: LEGO DUPLO Farm (DACTA/DUPLO/Farm), '98, 97 pcs, 6 figs
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Relativity Question
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| (...) Yeah, that's what I don't get, as well. The terms "inertial" and "noninertial" come from the britannica article, and they mean "non-accelerating motion" and "accelerating motion". But I'm not sure how to tell which is which without an absolute (...) (24 years ago, 8-Nov-00, to lugnet.off-topic.geek)
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