• Milady@lemmy.world
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    1 year ago

    Because they don’t “enter at speed”. The portal is moving ; not them. To them, they haven’t actually moved.

    • Swedneck@discuss.tchncs.de
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      1 year ago

      So like i said, i worry about the state of physics education.

      Motion is relative, things don’t have some magical hidden speed variable tracked by god, all that matters is how things move relative to other things. This is fundamental physics.

    • pancakes@sh.itjust.works
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      1 year ago

      But if you draw out the velocity vectors, the portal and people would have a would have a positive differential.

      Imagine a building comes flying at you and but you barely jump into the window. To you, you’re not moving, but everything else around you is. It would be the same principle if a moving portal came flying at you.

    • Natanael@slrpnk.net
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      1 year ago

      What happens to a pole?

      If the portal approach you as you hold it then the other end needs to be moving in it’s local space outside the second portal. That means it is given momentum which must come from the portal, likely taken from the momentum of the first portal which is moving. Also, the far end of the pole will likely experience a degree of inertia and push on the end you’re holding (at an equivalent of half the speed of the portal).