• GrimSheeper@lemmy.world
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    1 year ago

    I think it has to be A. You figure that if it were B, the people on the track would suddenly be traveling at a high velocity, but the train’s velocity wouldn’t be impacted at all, since there was no impact between the train and the people. Wouldn’t this mean that the portal had created energy, which is impossible?

    • SkyeStarfall@lemmy.blahaj.zone
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      1 year ago

      Portals already are infinite energy machines. Just out a portal up higher than the other one, and you get infinite energy generation via gravity.

    • javasux@lemmy.world
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      1 year ago

      Portals already break the laws of physics. The virtual world inside the orange portal is moving at the same velocity as the trolley, think about how much kinetic energy that is

      • GrimSheeper@lemmy.world
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        1 year ago

        I don’t think the portal contains anything within itself, though. The portal is a non-entity - it’s just that if you pass through the portal, you suddenly find yourself in a different location, as if that location were right next to you. The portal itself has no other properties of its own, I’d think.

    • ezri@lemmy.blahaj.zone
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      1 year ago

      I think in the hypothetical scenario of a magically self sustaining portal that seemingly generates its own energy to keep active, energy would be applied to the people via the portal

      • GrimSheeper@lemmy.world
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        1 year ago

        This still assumes that the portal is an infinite-energy machine, though, which I think is unwarranted and creates more difficulty than is necessary. I would assume that the portal itself has no properties and does not act on other objects.