If it's A, then it figures to me that the blue portal would enact some force on the structure on which it's placed when the tied up people plop out
this post was submitted on 18 Aug 2023
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B, but only their bellies; the portal is above most of their bodies, and their heads and ankles will get cut off for being off even the track.
C. A train flies out of the blue portal
This comment section reminds me a bit of these cringe powerscalers, discussing Saitama vs Son Goku in the comments of a YouTube video.
I don’t think portals carry the momentum with them. It’s as if the train is a moving tunnel. So A.
I think it's A because I assume a portal stitches two points in space to each other.
So if I have a surface A and B with a portal ']' in the middle A0 A1 ] A2 A3. B0 B1 [ B2 B3
A portal creates a new surface
A0 A1 ][ B2 B3
And if you move the portal the new surface changes.
A0 A1 A2 ][ B3
Speed is distance over time. When a portal moves the object that passed through the portal stays stationary. Let's say I am standing on B2. When the portal advances I find myself standing on A2 , have i moved? No the environment has changed but i am still in the same relative position with respect to the portal surface. No distance travelled so no speed.
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Someone take this a step further and make the train an airplane on a treadmill
My original idea for this involved two tracks (like the original trolley problem) and which track you chose (for minimum casualties) would depend on your interpretation of the physics problem.
Unfortunately it ended up super complicated and I made this simple one instead.
But adding the train on a treadmill is a great way to overcomplicate it further if I ever go for the complicated version.
I've seen this debate about the outcome of the moving portal. I'm pretty certain that because of inertia, and the people aren't moving, they will just plop out the other side. Think of it like moving a hoola hoop through the people. That's basically what the portal is.
The hoola hoop has inertia and is moving, but it doesn't actually come in contact with the people, so it passes right around them. There's no way for the people to have instant acceleration because the porta did, otherwise it'd be like them hitting a brick wall and they would probably explode
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