Article View: sci.space
Article #8409Re: Approaching c
From: Todd L. Masco
Date: Fri, 27 Jan 1989 07:02
Date: Fri, 27 Jan 1989 07:02
57 lines
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3144 bytes
CALVIN@JHUIGF.BITNET ("That's not lake Minnetonka...") writes:
> Anyway, here goes. It seems to me that the argument for the impossibility of
> attaining speeds faster than c is flawed. Logically, an argument is invalid
> if it, at some point, assumes that which it attempts to prove.
...
> Damian Hammontree
> System Programmer
Okay, he's your basic problem. You're looking at the problem
as though relativity was attemptig to argue through logic; It isn't
_exactly_ trying to do that; rather, it's trying to provide a model
that expresses what happens in "reality" (quotes for the enjoyment of
you quantum people).
The following gives a fairly reasonable explanation for you,
as a mathematics person:
Picture a typical graph of a hyperbole, say (x-c)(y-m) = (C).
[First c = c, second C = some constant, m=rest mass of object].
Now, imagine that, instead of moving along the x axis (which
we will now reveal to be 'velocity') when kinetic energy is added,
imagine that it moves along the line of the _graph_.
Close enough to x=0, the graph seems to be a straight
line. No problem. Newtonian mechanics works fine.
Once we get past, say x=c/10, we being to notice some amount
of discrepency; We're not quite going as fast as we should, time's
getting a wee bit altered, and some of our kinetic energy seems to
have, strangely enough, gone to our mass instead of our velocity.
Undaunted, we continue to accelerate the object, thinking,
"hurm. What a wonderful toy the universe is."
As we approach c, the graph has begun to approach the vertical
asymptote. More and more, our Kinetic energy (remember, KE=(mv^2)/2)
is increasing the mass, rather than the velocity. We can add KE to
our heart's content; The universe won't care, we'll continue to
travel along that hyperbolic line, approaching v=c, but never quit
obtaining it.
The above isn't exactly what happens. But it's close enough
to show the concept involved. Note that the structure does NOT
prohibit something moving faster than v=c; It only states that at v=c
we have a discontinuity, and anything travelling along one line can't
reach the other by conventional means (hedge, hedge).
Is it clearer? [I used to be a math major -- I got better]
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|Todd L. Masco | ...and the dead are, but for a moment, motionless... |
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ames!nrl-cmf!ukma!rutgers!rochester!pt.cs.cmu.edu!andrew.cmu.edu!tm2b+ From: tm2b+@andrew.cmu.edu (Todd L. Masco) Newsgroups: sci.space Subject: Re: Approaching c Message-ID: <YXs1Dcy00WB8EINop7@andrew.cmu.edu> Date: 27 Jan 89 07:02:00 GMT Organization: Carnegie Mellon, Pittsburgh, PA Lines: 57