• Goldmage263
    link
    fedilink
    arrow-up
    5
    arrow-down
    1
    ·
    1 year ago

    I don’t agree. Inertia and momentum are not affected by a portal, even a moving one. If so, their legs would be stretched as they were partially through the portal till the body was being jerked away from the neck causing an even greated relative velocity compared to entering the portal.

    • De_Narm@lemmy.world
      link
      fedilink
      arrow-up
      5
      arrow-down
      1
      ·
      1 year ago

      Let’s say the train moves at 100mph, therefore your body needs to exit the other portal at 100mph. Otherwise it would be compressed. What happens to the energy of this movement if you just stop on the other end?

      • InstructionsNotClear@midwest.social
        link
        fedilink
        English
        arrow-up
        3
        ·
        edit-2
        1 year ago

        We also need to consider the air that is in front of the train as it moves forward. That air is going into the portal at the rate the train moves forward and therefore coming out the other portal at that rate.

        • Bizarroland@kbin.social
          link
          fedilink
          arrow-up
          1
          ·
          1 year ago

          The air in front of the portal would be pushing into the portal, and the only acceleration on it would come from the air behind it being pushed into the portal and any other air pressure differences between the two sides.

          There’s no human pressure differences between the two sides of the portal, so there would no be any reason why you would suddenly be launched at 100 mph the way you would should the train have hit you. It would be like a tube or a hula hoop sliding over you at 100 mph.

          As long as you don’t touch the tube you’re fine.