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Let's say the two ends A and B of a wormhole are moving relative to one another.

If I stick a starship halfway into end A of the wormhole, does the part of the starship that sticks out of end B move along with end B, or does it remain stationary with respect to end A?

Assuming it does move, will a force be exerted on it if end B of the wormhole for some reason suddenly accelerates or decelerates?

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    $\begingroup$ Nobody in science can tell you what happens when you send a non-existent starship trough non-existent wormholes. For that you need a science fiction writer. $\endgroup$ – CuriousOne May 19 '15 at 22:44
  • $\begingroup$ @CuriousOne And yet Einstein described what happens to a non-existent twin traveling on a non-existent relativistically accelerating starship. He called it a thought experiment rather than science fiction. What happens to an extended object moving through a wormhole is a valid question in GR since it does allow wormholes. $\endgroup$ – Conifold May 20 '15 at 0:30
  • $\begingroup$ @Conifold: Einstein described a real world effect that can be seen in virtually every high energy physics experiment made since the 1930s or so. He also didn't work from an imagined scenario but he solved a problem relating to "the electrodynamics of moving bodies". If you read the second part of the paper, you will see what the real physical motivation for it is. It's not twins traveling in spaceships (or on trains). Einstein solved an experimental riddle that had existed for 20 years or so at the time he wrote the paper. Wormholes are not such a problem. $\endgroup$ – CuriousOne May 20 '15 at 0:58
  • $\begingroup$ @CuriousOne Einstein 1911:"If we placed a living organism in a box ... one could arrange that the organism, after any arbitrary lengthy flight, could be returned to its original spot in a scarcely altered condition, while corresponding organisms which had remained in their original positions had already long since given way to new generations." And Einstein worked from imagined scenarios quite often, equivalence principle came from another one. Wormholes are a useful imagined scenario that tests the predictions of GR, and it is analyzed by many experts including Hawking. $\endgroup$ – Conifold May 20 '15 at 2:34
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    $\begingroup$ Hi python dude, I was merely demonstrating what the "little" scientific problems are when someone starts talking about unidentified physical objects (aka UPO's). :-) $\endgroup$ – CuriousOne May 20 '15 at 6:42