Would a projectile fired in space and assuming there were no stars or planets in the way, would the projectile continue on to infinity, since the x-component of the projectile's velocity never changes from it's original?
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Assuming the projectile had enough velocity to escape the gravitational potential of the "projector" (system that fired it). And assuming that space-time is otherwise basically flat.
Then, Yes.
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$\begingroup$ So wait, the projectile itself has a gravitational pull? $\endgroup$ Commented Nov 3, 2011 at 2:42
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$\begingroup$ @LordZardeck: I assumed that the projectile was fired by something else and the two will be gravitationally attracted. $\endgroup$– SimonCommented Nov 3, 2011 at 3:03
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