Talk:Coin rotation paradox
 | This article was nominated for deletion on 27 December 2023. The result of the discussion was keep. |
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Issues with the Article
edit- For one thing, Coin Rotation Paradox is not a hoax.
- It has plenty of sources, both on the web and in books.
- Wolfram Mathworld is most reliable source you can ever get for mathematics related articles.
This article needs sources (RefImprove template)
editThe article has no citation in all sections. Only the lead has one.
Unequal radii
editThe formula R/r + 1 is correct. However, the reference – author Y. Nishiyami – doesn't give the formula, much less prove it is true for any R and r. Also, Nishiyama says, “Separating revolution from rotation is helpful for understanding, but doing so does not provide a fundamental solution.” This latter part is not true. For a coin with radius r to make one revolution around a stationary coin with radius R, the center of the moving coin travels a circular path with radius R + r. (R + r)/r = R/r + 1. Likewise, the circumference of the path is 2*pi*(R + r)/(2*pi*r) = R/r + 1 times the circumference of the revolving coin. Rotation is irrelevant. Merjet (talk) 10:33, 20 June 2020 (UTC)
Please, stop this embarrassment!
editWhy is English Wikipedia embarrassing itself with this hoax article?! Just take two coins of the same size, draw a line on both and circle one around the standing other. You'll see for yourself that this is ridiculously wrong. And after that, you should burn this article with fire! 141.136.215.208 (talk) 09:01, 1 October 2022 (UTC)
- you should see the new Video from Veritasium Osw719 (talk) 17:17, 1 December 2023 (UTC)
- This isn't even a paradox, it's just geometry. This term has been used in some internet videos or in few books which rather target maths learners than scientific demands. But since it isn't really a paradox and covered by regular geometry, this doesn't need an article for it's own. And even if it does it describes more a phenomen of popular culture than physics. - Flexman (talk) 01:12, 27 December 2023 (UTC)
- Uh, this article is just fine, and plus, multiple people wanna keep this. TheguyinterestedinstuffIG (talk) 22:47, 1 January 2024 (UTC)
Reverse the GIF of the coin
editRequesting that the GIF depicting the coin made to rotate around another coin be reversed. This is to help viewers compare the coin rotation with the cardioid depiction being done right below it. Understandably this may lead to conflicts with other wiki, so I put this request up for discussion on the TALK page to see if there may be hurdles to consider with this request. Exoscope (talk) 18:16, 9 November 2024 (UTC)
- I have gone ahead and attempted a change that adds this reversed rotation. If there are any concerns, the edition can be reverted by the admin/moderator who keeps track of this page. Exoscope (talk) 18:34, 10 November 2024 (UTC)