Timeline for Is there a sideways-walking rolling convex body?
Current License: CC BY-SA 3.0
10 events
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| Apr 13, 2017 at 12:58 | history | edited | CommunityBot |
replaced http://mathoverflow.net/ with https://mathoverflow.net/
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| Apr 17, 2014 at 15:52 | comment | added | Joseph O'Rourke | @JoelDavidHamkins: Perhaps I should modify the question to require the initial vector of motion to be straight down $y$---roughly as in the drawn contact path. This would exclude the cylinder and many other examples. | |
| Apr 17, 2014 at 13:47 | comment | added | Joel David Hamkins | Ah, that makes sense. Thanks! Incidentally, the MoMath exhibit also includes some extremely interesting non-convex shapes that roll in a very interesting way. The goal for participants is to get the shape to follow the pattern inscribed on the inclined table as it rolls, and it is challenging to get it exactly right. I think I've spent hours there in total. | |
| Apr 17, 2014 at 13:43 | comment | added | Joseph O'Rourke | @JoelDavidHamkins: I meant composed of a uniform material, i.e., not like loaded dice, with one interior portion including more dense material than another interior portion. | |
| Apr 17, 2014 at 13:21 | comment | added | Joel David Hamkins | Could you tell me what is the precise meaning of "homogeneous body" in your first sentence? | |
| Apr 17, 2014 at 10:28 | comment | added | Joseph O'Rourke | @JoelDavidHamkins: I don't see how to alter the question to exclude the cylinder, but that is not what I meant. :-) What I sought you found at MoMath. Thanks! | |
| Apr 17, 2014 at 9:38 | vote | accept | Joseph O'Rourke | ||
| Apr 17, 2014 at 3:47 | comment | added | Joel David Hamkins | Doesn't a circular cylinder do this, if you start it at an angle with respect to straight downhill? Perhaps I've misunderstood the question. | |
| Apr 17, 2014 at 3:37 | answer | added | Joel David Hamkins | timeline score: 16 | |
| Apr 17, 2014 at 0:21 | history | asked | Joseph O'Rourke | CC BY-SA 3.0 |