Timeline for elliptical ring rolling on a horizontal surface
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| Feb 7, 2013 at 17:35 | history | edited | John Alexiou | CC BY-SA 3.0 |
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| Feb 7, 2013 at 17:32 | comment | added | John Alexiou | The polar equation for the ellipse is not exact, but approximate for small $e$. The exact is $r(\varphi)=\frac{a b}{\sqrt{(b^2-a^2)\cos^2\varphi+a^2}}$ where $a$,$b$ are the major and minor radiuses. In this case, $b=a (1-e)$ is used. | |
| Feb 7, 2013 at 15:35 | comment | added | Martin Gales | Really, great work! | |
| Feb 7, 2013 at 15:34 | vote | accept | Martin Gales | ||
| Feb 7, 2013 at 15:29 | history | edited | John Alexiou | CC BY-SA 3.0 |
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| Feb 7, 2013 at 15:29 | comment | added | John Alexiou | Oops! .... good catch. | |
| Feb 7, 2013 at 15:21 | comment | added | Martin Gales | Many thanks for this work! You probably meant $\ddot{y}=\mbox{-}\, g$. The result does not need to depend on $m$? | |
| Feb 6, 2013 at 16:14 | history | answered | John Alexiou | CC BY-SA 3.0 |