Rotation paradox | coin rotation paradox simply explained | How often does the small circle rotate?

In this video, we deal with the so-called rotation paradox (coin rotation paradox). To do this, we look at a large circle and a small circle. The diameter of the large circle is three times that of the small circle. The question is how many times the small circle rotates around its own axis if it is completely rolled around the large circle. The answer is not 3.

00:00 Rotation paradox
00:52 Willis equation
02:25 Resting observer
03:18 Moving observer
04:17 Rolling on the inside of the circle
05:19 Moon

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