• aerowave@feddit.uk
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    1 year ago

    Speedy thing goes in, speedy thing comes out

    E: I was just quoting GladOS… Not really thinking about the actual physics!

    • Kaosmace@lemm.ee
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      1 year ago

      Yeah but the thing isn’t moving the portal is, and the energy has to come from somewhere if the portal makes the thing go fast.

      • Duamerthrax@lemmy.ml
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        1 year ago

        The energy would come from the trolley. The people would launch out at approximately the same speed as the trolley interacts with them and the trolley would slow down in response to how much kinetic energy was transferred to the people.

      • Natanael@slrpnk.net
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        1 year ago

        Then they can’t enter at all and have to be flattened by the portal, because they must have motion too exit the other portal

  • PeriodicallyPedantic@lemmy.ca
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    1 year ago

    It needs to be 2. Otherwise all the people will materialize inside eachother. In fact, everyone will be deposited onto the 2-dimensional pane of the blue portal itself, like an infinitely thing coat of paint, absolutely smearing them.

    Think about it. As your fingertips enter the orange portal, they materialize at the entrance of the blue portal. Then your wrist enters the orange portal, where does it materialize at the blue portal?

    • If your fingers shift to make room, then that has imparted momentum and it’s option B.
    • If you continue to materialize on the other side of the portal like a mirror image, then for all intents and purposes the blue portal is also moving at the same speed as the orange portal, even if orange ring appears still.
    • If your fingertips don’t have momentum and your wrist materializes at the portal, then your wrist is occupying the same space as your fingertips. Congratulations, you’re now a paste.

    For whatever reason I feel more willing to break conservation of momentum than I am to

    • Lizardking27@lemmy.world
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      1 year ago

      Yeah I really think you’ve misunderstood some things. An infinitely thin coat of paint? Are you familiar with the mechanics of the Portal games?

      It would be like dropping a hula hoop over a basketball. Regardless of how fast the hoop falls, the basketball still just sits there.

        • Shiki@lemmy.world
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          1 year ago

          Why?

          Where does the energy even come from?

          A hole/portal doesn’t create or generate energy it just passes things through.

          Just think of it as a hole across space because that is exactly what a portal is.

            • Shiki@lemmy.world
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              1 year ago

              No energy is every transferred as a result of a portal

              You fly in the air if you drop in one because you are carrying momentum downwards that suddenly translates to upwards

              You are sat in the floor, a portal flies towards you. You are sat at the floor at the end, you had no momentum going in and no momentum going out

                • Shiki@lemmy.world
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                  1 year ago

                  Zero fast. There is no energy being transferred to the people, they would plop out and push into each other as they are forced through.

                  If you blocked the stationary portal then the portal moving would essentially just be a wall, no one would go though.

                  This whole relative thing makes no sense, energy isn’t just created because it’s observed by someone else, the door is moving not the people so them sitting there won’t suddenly be catapulted going through a moving portal, where is that energy created?

                  Your wind question is confusing.

      • insomniac_lemon@kbin.social
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        1 year ago

        Why the /s?

        It’s true. Obviously it makes for simpler puzzle design plus was easier to ignore the full capability (even the version in 2 seems to just work enough to allow the set-piece), so it seems silly to use developer limitation as a gotcha.