00:09:00
The dynamics of a spinning chair
00:08:00
Longboard data analysis
00:04:00
Longboard physics
A few (surprising?) thoughts on how the wheels on a longboard or skateboard actually move.
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00:07:00
The Longboard – speedometer
Jonathan describes his adventures with a longboard and some different methods of making a speedometer for it.
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00:05:00
The Fresnel Lens
Early lighthouses used coil and wood fires before moving on to gas and then electricity powered lights. Massive improvements took place by using a lens system around the light. The development of the Fresnel lens brought what we now regard as the....
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