| Title: | Mathematics at DEC |
| Moderator: | RUSURE::EDP |
| Created: | Mon Feb 03 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2083 |
| Total number of notes: | 14613 |
I have a circular disk and an elliptical disk, and I'm going to roll them both down an incline. Assuming the circumferences are the same, they should both move along the incline at about the same average rate. Right?
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 468.1 | ENGINE::ROTH | Tue Apr 08 1986 08:36 | 9 | ||
No, their moments of intertia will differ, and the ellipse could clearly be in a stable position depending on its eccentricity and the slope of the incline, it would have to depend on the amount of push you gave them also. The ellipse could lose contact with the incline... By conservation of energy, if the ellipse and circle had the same moment of intertia they would have the same 'average' rate of motion down the incline. - Jim | |||||
| 468.2 | CLT::GILBERT | Juggler of Noterdom | Tue Apr 08 1986 20:24 | 2 | |
Does an ellipse have the same moment of inertia as a disk of the
same circumference?
| |||||