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Originally Posted by KickAssClown
Your assuming that the EM radiation is part of the mass, and that it moves with the frame. As I understand special relativity though, the photon's frame is invariant, where as the mass's is variant.
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For light
So the momentum is related to the frequency, which doppler shifts.
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Erasmus, how then do I move my center of mass? I am an object, I have mass, and I have a center of mass. I walk and that changes my momentum, correct? As I understand it, how I do that is by difference of potentials. Is it so improbable that you can power a thruster without ejecting things out the tail end?
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You don't move your own center of mass. You push off the Earth, and you move relative to the Earth. The center of mass of the you-Earth system does not move.
It is impossible to power a thruster without ejecting something IF momentum is conserved.
-Will
