On 2/7/2014 5:53 PM, [email protected] wrote:
On Friday, February 7, 2014 10:34:50 PM UTC, Edgar L. Owen wrote:
Ghibbsa,
Well yes, basically that's it. The question I have is why we have to choose
one
frame over the other to get the correct results.
You don't. But in almost all cases there is a frame in which it is easy to apply the
equations, one that takes advantage of symmetries and leaves out negligible effects. So
you do the analysis is that frame and then you transform the answer if necessary to some
other frame of interest. But in general what you're interested in is frame independent:
Did the spaceship rendezvous with the planet or miss it? Did the tank fall in the pit or
not? To do the transformation you have to know how things transform, which for inertial
frames in flat spacetime is by Lorentz transformations, i.e. those that leave lightcones
invariant.
Brent
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