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Tippe Top - The Spinning Top that flips itself over when it is spun!

This is a fascinating spinning top with an interesting behaviour. The 'Tippe Top' inverts itself when spinning at sufficient speed. It does this because its centre of mass does not coincide with the geometrical centre of sphere. This means that when spinning the bulbous top slides over the surface on which it is spinning and this friction and motion causes enough force to 'drive' the spinning top up and over until it is spinning on the stalk. Once on the stalk there are far less sliding forces and the top can now spin stably until it no longer has enough energy to sustain its speed and spin. This Tippe Top is 29mm in diameter ( 1.14 inches ) and 36mm tall (1.41 inches ) You can buy this from: http://www.gyroscope.com/d.asp?produc... Detailed explanation of science and history behind the Tippie Top: https://arxiv.org/pdf/physics/0507198... Or http://www.fysikbasen.dk/English.php?... I hope that my understanding and explanation of this spinning tops behaviour is accurate. If anyone can suggest corrections or improvements, I am always happy to update and refine the text that accompanies my videos.