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by JKCalhoun 249 days ago
Love the painting of the huge toroidal space station—with the houses and forests inside.

I had a thought experiment: if you could ride a bicycle (motorcycle?) against the direction of spin of the station you would essentially be "stationary". You would still have a velocity into the always-sloping-up wheel. What if you rode up a gentle ramp? Could you break away from the surface of the wheel then and become "weightless"?

3 comments

Important to note that while the station has angular velocity it is not usually accelerating.

If you decelerate and cancel your own angular velocity relative to the station hub, you do indeed simply stop experiencing gravity.

Imagine instead jumping off the 'stationary' hub of a rotating station. You simply float under no gravity until you hit the ring. The angular velocity imparted on you by the ring is the gravity you perceive. But once you have that angular velocity, you can jump from the ring's inner surface and fall back down as if the gravity were real.

One way such stations are imagined in media is with a spiral ramp from the surface of the ring up to the hub. It works just like you expect. You gradually shed your angular velocity by climbing the 'gravity well'.

If there is an atmosphere inside, it will presumably rotate with the structure & will start imparting the rotation velocity on you as you close to the surface from the hub.

Also the surface rotates at potentially quite a high speed compared to you, with likely various structures sticking out, that might smash to you as you get closer, so better watch for that. :)

I think so! I doubt you need the ramp even.

The trick is that the bike is also accelerating (even at constant "speed") due to going in a circle.

Sounds like a good question to submit to Randall at xkcd for his What If? series.