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Saturday, 3 June 2017

Why Roller Coaster Loops Are Not Perfect Circles


Why Roller Coaster Loops Are Not Perfect Circles
You know that stomach you flip you feel when you reach the top of a loop? It could be so, so much worse.

June 3, 2017 at 08:42PM
via Digg http://ift.tt/2qMVgUI

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