Sunday, Funday

hippy

Technical Support
Staff member
Consider a wheel within a larger wheel; a car tyre and its wheel hub is an example most people are familiar with.

As we roll the tyre through one revolution, it will have traversed a distance of X, which is the same as its circumference. Obvious stuff so far.

Now look at the inner wheel. It has also traversed a distance of X while completing one revolution but that distance is much greater than its circumference.

Go Figure!



Image and intrigue courtesy of http://io9.com/the-wheel-paradox-that-stumped-aristotle-and-galileo-1507994415
 

Paix

Senior Member
And if both diameters were on rails and there was no slippage then it wouldn't rotate very far at all.

The hub would travel though a much lesser distance for one revolution. It's all a matter of Revolution Euducation ! :)
 
Top