Posted by NCWayne on November 24, 2014 at 08:32:19 from (173.188.169.54):
In Reply to: Another physics oddity posted by Steve@Advance on November 24, 2014 at 07:57:07:
Now sure it's exactly physics, but how about this one. You can use any two size circles you want, but here lets use 24" and 48" in circumference.
Now, mark a point on the rim of the circle that's 48" in circumference. With that mark as a starting point, roll the circle one complete revolution. What you'll find is the circle will move forward 48" in one revolution.
Now do the one that's 24" in circumference the same way. Again, you'll get a forward movement of 24", the same as the circles circumference, for one complete revolution.
Now, attach the two circles together with the marks on the rims lined up together. Now, using the 48" circle as the carrier, roll the assembly one complete revolution and look at the results. What you'll find is that the 24" circle also went one complete revolution, but it actually traveled 48". Conversely, if you use the 24" circle as the carrier, the 48" circle will only travel 24" -vs- 48".
In both cases, the circles, by all rights, shouldn't be able to travel more than the length of their circumference in one complete revolution. What's strange is that you don't change the circumference of either circle, you don't change what 360 degrees, or one complete revolution is, as both circles go around only once in any of the scenarios mentioned. However, when nothing else is done to either circle but attach them together (change their physical location), they basically double, or half, the distance they can travel, and still only complete one revolution.
I read an article about this years ago. Simply saying they are attached together means absolutely nothing in the scientific/mathematic realm as the facts are absolutely nothing changes with the dimensions of either circle to cause the change in forward motion relevant to a revolution as science/math dictates that it should. To, the phenomenon occurs regardless of the measurements used. Based on what the article said, this is one problem that, so far, has absolutely no mathematical solution as to how/why it happens beyond the fact that it does...
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