this post was submitted on 18 Aug 2023
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[–] Yadaran@feddit.de 2 points 2 years ago

The Portal can't move front or back, only "to it's sides"

[–] reverendsteveii@lemm.ee 2 points 2 years ago (7 children)

The only way it could be B in this universe is if the train also decelerates equivalent to how the people accelerate. If the people accelerate and the train maintains velocity you've created energy in a closed system.

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[–] Zithero@lemmy.world 2 points 2 years ago

A, the people are traveling towards the portal, not the other way around.

If they were falling/running at the portal it would be different.

Here the portal is moving forward towards them, they have no momentum.tk travel through the portal.

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