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- Ernie wrote:
-
- >And consider a wheel rolling over a peak: the axis of rota-
- >tion moves and the wheel rotates, but the point of contact with the
- >terrain is fixed for a time.
- >
- Not true! If so then the point of contact would have to be infinitely small.
- Otherwise it is just a rounded form, but very small, over which the wheel
- rolls. Compare it to a wheel the size of a small moon rolling over the Mount
- Everest. To the wheel it might seem like it touches the same spot, but
- someone standing there, panting in his oxygen gear, would definitely see a
- lot moving, and definitely not touching the same spot all the time. This
- would help to solve these problems. My experience is that ones personal
- experiences often do not match what really happens if you think about it.
-
- Daniel Dugour, AniTime 3D Computer Animation
- Bilderdijkstraat 181-3a
- NL-1053 KR AMSTERDAM
- The Netherlands
- Phone/Fax: +31-20-6836059
- eMail: anitime@xs4all.nl
-
-