From: Jonathan Reeves (JonathanR@mail.iclshelpdesks.com)
Date: Wed Feb 17 1999 - 07:27:29 MST
Anders Sandberg writes:
>Jonathan Reeves <JonathanR@mail.iclshelpdesks.com> writes:
>> The energy needed to accelerate it from it's _starting_ point
increases,
>> but not the energy it needs to accelerate itself.
>> An object/vessel which is capable of generating it's own thrust will
not
>> need to output more power to maintain a constant acceleration the
>> further it gets from it's origin.
> True. But an observer sitting at the origin will not see it pass c,
> and neither will any other observer moving in an intertial frame with
> a relative velocity to the origin less than c. A spaceship
> accelerating at constant acceleration (as measured by the crew) will
> describe a hyperbolic path in a Loretnz diagram; it will never break
> c.
Exactly. It will never appear to pass c (either in the original
inertial frame or in a Lorentz diagram), but this does not mean it is
not travelling ftl relative to it's start point.
What was the original point?
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