relativity? paradox?

Hi,

I have been thinking after reading the Physics FAQ the following.

I guess there is so much to swallow and I can never know everything, so I would like to toss in a few questions not specifically with the hope of a straight answer, but moreso a reference to which theories to read up on (not really interested in forumulas or proving the theory though).


If I take an object (eg: myself). I am the observer and I have a mass (assume whichever interpretation of mass you like). I stand still (from my observation) but I am moving at a high velocity because I am on Earth which is moving at high speed around it's orbit. The earth is in our solar system which is also moving around. Our galaxy is moving around. Perhaps there are clusters of galaxies that move around. Relative to myself I am still, relative to Earth I am still. My mass in relation to Earth can be calculated, but is this my true mass considering all the moving around that's going on? Now, given the unknown levels of components of motion (could it be infinate?) it would suggest that it isn't possibly infinate because I would be approaching the speed of light just by standing still (observing myself). Given a finate known number of components of motion, perhaps a true actual velocity could be calculated and therefore my true mass also?

Another way of thinking about this could be if I had a train moving forward at 100km/h on Earth, on it there was a smaller train travelling at 100km/h (ie: it is 200km/h if Earth is the observer), on this smaller train was another smaller train travelling at 100km/h, how many trains upon would we need to travel at the speed of light? Given that Earth is an observer of the first train, but the Earth itself is in a multi-leveled state of motion. Would such a calculation become paradoxical as it is supposedly impossible to move at the speed of light, so regardless of how many trains upon trains there are, we would get to a point that the bottom train could just not move because the top train would approach the speed of light if it did?

Regards.
.

Relevant Pages

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  • Re: The train and the light inside.
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