lauthals

Talking about Arsène's Arsenal - you certainly don't know about (and honestly, why should you) the German coach Wolfgang Wolf managing Wolfsburg around 2000.

That'd be gravity. But the difference is that we are not moving (at least not relative to the ground) before entering the portal, so gravity just keeps us at the bottom.

After entering the portal, we are having a movement to the speed of the entering portal as we already established. So, gravity has yet to work against this motion (which will, of course, eventually keep us on ground again because gravity does its thing. But temporarily, and depending on the actual speed, we might have a bit of air time in this scenario).

I have my doubts, that this will convince you now. However, I gotta say, it was a lot of fun discussing this completely speculative topic with you. Also, I give you, that - while I'm still 100% sure that B is the only sensible solution for this question - you helped me better understand why people might think A is correct.

Have a nice one :)

But now, when you have a moving object (my body) we need a force to stop that momentum. Where does that force come from?

Nobody said it's teleporting the whole body. But that was my only explanation of how something can move without speed.

But great, that's what I wanted to clarify the whole time. I think my explanations were too complicated, sorry.

So, taking your example:

When the portal falls on me - as soon as it reaches my neck. Only my head is coming out of the other portal, literally right above the ground. Correct?

As the portal keeps falling down, more and more of my body comes out of the other portal until my whole body is out of it. Correct?

Which leads to the fact that my head was moving from right above the ground to the height of my body. Correct?

So my head moves upwards. And since it takes time for my head to move upwards, we can measure the speed of my head moving upwards. Wouldn't you agree?

So, you say, they are moving without speed. Which could only mean when one person touches the portal in one millisecond, his complete body just disappears completely from the rails and in the same millisecond his body appears behind the other portal.

That's not how portals in the game work. That's rather how the transporter in Star Trek works.

Yes. And you said it correctly: they are moved through space. Now tell me: at which speed are they moved through space?

That's not what I mean. Let's just look at one person: the person will not just appear as a whole at the blue portal, right? First there will be, I don't know, the left arm, then the left side of the torso, the middle part... and so on. That's what I meant with centimeter by centimeter, atom by atom - pushing through the portal. Would you agree?

At least that's how it's in the game. It's not that you are touching one portal, despawn and appear at the other portal, right?

Of course I see the orange portal moving. So we agree the orange portal is moving, the blue is stationary.

So, when you're saying "the people just pop out the other side". What does that mean? Do they pop out one by one? So one moment, no one is there, the next moment one person spawns and after that the third person spawns? Or do they spawn altogether? Or does each person come from the portal centimeter by centimeter, atom by atom - pushing through the portal?

Do we agree that the massive block with the blue portal is not moving? So, imagine we are standing right in front of it when it happens - what happens exactly? How do the people appear?

So, how would the people come out of the portal without movement?

To make it clear from the start: I agree 100% with B - there has to be movement, because without it, people wouldn't come out of the portal at all. And if there is a movement, then the only reasonable speed would be that of the train.

But: Your question about the energy is still interesting. It must come from somewhere. And I think, the only source, from which it can come, is the train. That is, the train would lose energy and therefore slow down.