this post was submitted on 18 Aug 2023
926 points (97.0% liked)
Memes
45731 readers
1392 users here now
Rules:
- Be civil and nice.
- Try not to excessively repost, as a rule of thumb, wait at least 2 months to do it if you have to.
founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
No, the speed of the pedestrians relative to the portal is not zero.
But the pedestrians have no momentum, only the portal has momentum.
Replace the portal with a normal open doorway, or that gameshow "hole in the wall", when someone passes through the hole, they aren't launched out of the other side, they're still just standing there as the door passes around them.
They have momentum though. They're on the earth (presumably), which is yeeting through space at a rapid pace. Portals must respect relative speed, otherwise everything would fly out due to their speed.
No your wording was correct, do not apologize.
If we assume portals obey https://en.wikipedia.org/wiki/Galilean_invariance, then there's no difference between "the tram|portal is moving and the people are stationary" and "the tram|portal is stationary and the people are moving." The outcome should be the same.