Flattening of the earth: Rotating brass hoops.

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(A)Mechanics - A+0: Acceleration

Circular Motion: Flattening of the Earth Device. Flexible brass hoops are freely mounted on the axle and are able to slide. As the device is rotated, the brass hoops flatten out into ellipses.
UCB Index: 
A+0+56
PIRA Index: 
1D52.10
Demo Diagram: 

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A+0+57 Rotating loop of chain rolls across bench.