Editing Talk:2882: Net Rotations
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Wait, so I'm not the only one who thinks about this? [[Special:Contributions/172.71.167.177|172.71.167.177]] 23:28, 17 January 2024 (UTC) | Wait, so I'm not the only one who thinks about this? [[Special:Contributions/172.71.167.177|172.71.167.177]] 23:28, 17 January 2024 (UTC) | ||
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Second! Still, I'm surprised that there are no edits yet. [[Special:Contributions/172.70.210.160|172.70.210.160]] 23:58, 17 January 2024 (UTC) | Second! Still, I'm surprised that there are no edits yet. [[Special:Contributions/172.70.210.160|172.70.210.160]] 23:58, 17 January 2024 (UTC) | ||
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This sounds like the premise of the 1966 sci-fi story The Revolving Boy by Gertrude Friedberg. I recall reading it sometime in the 1960s or ’70s. I wonder whether Randall has read the book too — https://solarbridge.wordpress.com/2011/05/19/the-revolving-boy-gertrude-friedberg/ | This sounds like the premise of the 1966 sci-fi story The Revolving Boy by Gertrude Friedberg. I recall reading it sometime in the 1960s or ’70s. I wonder whether Randall has read the book too — https://solarbridge.wordpress.com/2011/05/19/the-revolving-boy-gertrude-friedberg/ | ||
I'm drawing a blank. [[Special:Contributions/162.158.158.68|162.158.158.68]] 01:05, 18 January 2024 (UTC) | I'm drawing a blank. [[Special:Contributions/162.158.158.68|162.158.158.68]] 01:05, 18 January 2024 (UTC) | ||
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I feel like the "worldline torsion" line needs to be explained moreso than the OCD thing, since "worldline" is a word people might not know and it's the crux of the joke. [[Special:Contributions/162.158.62.50|162.158.62.50]] 02:47, 18 January 2024 (UTC) | I feel like the "worldline torsion" line needs to be explained moreso than the OCD thing, since "worldline" is a word people might not know and it's the crux of the joke. [[Special:Contributions/162.158.62.50|162.158.62.50]] 02:47, 18 January 2024 (UTC) | ||
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This comic makes sense in 2D because the space of rotations has fundamental group ℤ, but in 3D wouldn't you have at most ℤ/2ℤ corrections to make, since SU(2) double-covers SO(3)? cf. https://en.wikipedia.org/wiki/Plate_trick [[User:Ncf|Ncf]] ([[User talk:Ncf|talk]]) 09:27, 18 January 2024 (UTC) | This comic makes sense in 2D because the space of rotations has fundamental group ℤ, but in 3D wouldn't you have at most ℤ/2ℤ corrections to make, since SU(2) double-covers SO(3)? cf. https://en.wikipedia.org/wiki/Plate_trick [[User:Ncf|Ncf]] ([[User talk:Ncf|talk]]) 09:27, 18 January 2024 (UTC) | ||
− | :Considering the plane in which you are doing your rotation changes during the day due to Earth rotation, I think that it doesn't make sense in 3D at all | + | :Considering the plane in which you are doing your rotation changes during the day due to Earth rotation, I think that it doesn't make sense in 3D at all. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 21:00, 18 January 2024 (UTC) |
Is it worth mentioning the real medical conditions of torsion, e. . a torsion fracture (https://en.wikipedia.org/wiki/Torsion_fracture)? [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 12:43, 18 January 2024 (UTC) | Is it worth mentioning the real medical conditions of torsion, e. . a torsion fracture (https://en.wikipedia.org/wiki/Torsion_fracture)? [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 12:43, 18 January 2024 (UTC) | ||
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Remember that, to do it properly, any turns made in your car also have to be reversed in your car, to account for the rotation of the car's atoms. Go do a full loop through a counterclockwise cloverleaf! (Finding one is left as an exercise to the reader.) [[Special:Contributions/108.162.238.82|108.162.238.82]] 13:05, 18 January 2024 (UTC) | Remember that, to do it properly, any turns made in your car also have to be reversed in your car, to account for the rotation of the car's atoms. Go do a full loop through a counterclockwise cloverleaf! (Finding one is left as an exercise to the reader.) [[Special:Contributions/108.162.238.82|108.162.238.82]] 13:05, 18 January 2024 (UTC) | ||
Don't think it’s worth adding to the article but thought I would mention it here, anyone who has experience spending a long time in a VR headset will almost certainly have had to do this at some point to untwist the tether. To the point that there are apps you can run that show you how much your rotation has changed from the set 0 orientation. [[User:TomW1605|TomW1605]] ([[User talk:TomW1605|talk]]) 13:13, 18 January 2024 (UTC) | Don't think it’s worth adding to the article but thought I would mention it here, anyone who has experience spending a long time in a VR headset will almost certainly have had to do this at some point to untwist the tether. To the point that there are apps you can run that show you how much your rotation has changed from the set 0 orientation. [[User:TomW1605|TomW1605]] ([[User talk:TomW1605|talk]]) 13:13, 18 January 2024 (UTC) | ||
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The CPSC recommends merry-go-rounds be limited to 13 ft/sec. https://www.sportsplayinc.com/images/cpsc.pdf For a 10 ft radius, that would be one rotation every 4.8 sec. Over "one long afternoon" (which I'll take as 6 hours) that would amount to 4,469 rotations. If you compensated for this with a mere one rotation per day, the excess rotation would be completely offset in 12 years and 3 months, so "decades" is quite an exageration. [[User:Loeb]] | The CPSC recommends merry-go-rounds be limited to 13 ft/sec. https://www.sportsplayinc.com/images/cpsc.pdf For a 10 ft radius, that would be one rotation every 4.8 sec. Over "one long afternoon" (which I'll take as 6 hours) that would amount to 4,469 rotations. If you compensated for this with a mere one rotation per day, the excess rotation would be completely offset in 12 years and 3 months, so "decades" is quite an exageration. [[User:Loeb]] | ||
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It makes me think a lot about [[162: Angular Momentum]] [[Special:Contributions/141.101.98.34|141.101.98.34]] 19:45, 18 January 2024 (UTC) | It makes me think a lot about [[162: Angular Momentum]] [[Special:Contributions/141.101.98.34|141.101.98.34]] 19:45, 18 January 2024 (UTC) | ||
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