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Jul 2, 2018 at 0:53 comment added Jennifer And your point is?
Jun 30, 2018 at 13:11 comment added Fattie "But if you jump straight up from the viewpoint of someone not rotating with the ring, you will come down in a different place" @jennifer, that is all precisely, exactly, mathematically, as on Earth.
Jun 30, 2018 at 10:38 comment added Jennifer Yes, if you consider the air still relative to the ground (the ring). In this case, your apparent motion will be straight-up-and-down. But if you jump straight up from the viewpoint of someone not rotating with the ring, you will come down in a different place (other than where you left your footprints when you jumped). In this case, you will experience a gentle breeze -- which will be significant if you jump high enough to be up there for a few minutes. And forget Star Trek, think of Babylon 5 where Sheridan leaps out of the transport along the axis.
Jun 28, 2018 at 18:49 comment added Fattie If the air is still (ie, it is a still day) you jump up and down, no effect from the wind. If it's a windy day, you jump up and down, you will be moved slightly by the wind. Same on Earth or D-Ring-World.
Jun 28, 2018 at 18:36 comment added Jennifer It's amazing how many people out there just don't get it. I don't have a Dyson ring at my disposal, so I can't demonstrate it, but it's true. (I'm assuming the ring rotates faster than the Earth, and that the jump is of sufficient duration that the moving air has a cumulative effect.)
Jun 25, 2018 at 13:36 comment added Fattie "you would negate the direct effects of the ring" It's absolutely impossible to "negate" the effects of the ring (ie: of your momentum). In this universe the only way you can "negate momentum" is if you have a Star Trek -like momentum canceller! :) Your "velocity" is simply a delta on your previous velocity - as with any velocity.
Jun 25, 2018 at 13:34 comment added Fattie hence! "The exception is if you run counter to the direction of rotation and then jumped up ..... " there is absolutely no exception. Regardless of which direction you run, everything works exactly the same as on Earth. {Obviously, on Earth if you "run" incredibly quickly, or "jump" ridiculously high, strange things will happen, but the same is true on the Dyson Ring - it's an identical experience.}
Jun 25, 2018 at 13:31 comment added Fattie (Footnote - of course, there are absolutely tiny aerodynamic effects of the air as you jump up and down, ie, you will be slowed down a tiny bit depending on what sort of clothes you are wearing; this is utterly unrelated to the discussion at hand.)
Jun 25, 2018 at 13:29 comment added Fattie Point 2: Now say you're on the Dyson ring. You jump up and down 1 meter. Again, you try it in both the normal atmosphere of the Dyson ring, and you try it in a vacuum. (Simply, you could be in a vacuum room in a research center.) Once again, on the Ring, those two jumps are absolutely identical - absolutely no difference. The atmosphere is utterly, totally, completely unrelated to the "virtual gravity" issue you experience in a Dyson Ring. (And indeed, in Point 1, The atmosphere is utterly, totally, completely unrelated to the issue of the fact that the Earth's surface is spinning.)
Jun 25, 2018 at 13:27 comment added Fattie Hi @jennifer: I believe there are 2 things you don't understand. Point 1: Say you are on Earth. (Earth has atmosphere.) You jump up and down, say one meter. Now say you are on Earth, but zero atmosphere (simply, you could be in a vacuum room in a research center.) Again, you jump up and down 1 meter. (Note too that the surface of the Earth is, in fact, spinning very rapidly.) In both those cases (atmosphere or vacuum), exactly the same thing happens. You go up and down on the same spot, exactly as per normal experience. The atmosphere is utterly, totally, completely unrelated.
Jun 25, 2018 at 6:38 comment added Jennifer @Fattie -- Actually, it is correct. The motion of the air, being in sync with the rotation of the ring, would effect any angular motion you make while jumping up (either with or against the rotation). And a Dyson ring without any atmosphere (or sidewalls or whatever to hold in that atmosphere) would be pretty useless.
Jun 18, 2018 at 20:19 comment added Fattie This is incorrect. Air is not involved. If you "jump up" you make a parabola exactly "as if" you were on Earth,
Jun 17, 2018 at 19:39 history answered Jennifer CC BY-SA 4.0