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Perpetual motion
Disco Matt:
Perpetual motion simply cannot work. You can make things ultra low friction (brushless motors with ballraced bearings for example) but you can't get something for nothing.
The Japanese "Maglev" trains use magnets to support the weight, so the train floats above the track. It still needs power however, as air resistance will slow it down. You can get higher speeds for the same power input though.
Tommo:
--- Quote from: muddyjames on January 30, 2008, 18:51:42 ---I reckon it is done by magnets. Isn't there a train in Japan that runs on electro magnets?
As the magnets on the "track" get turned on and off it makes the magnets on the track and the train repel against each other causing motion. Could the same thing be happening here except once that wheel is going it just gets faster and faster as the magnets repel each other?
I did notice 2 wheels on that thing that was spinning. Could the outer ones be + and inner be a - one?
--- End quote ---
to 'switch magnets on and off' they need to be electro magnets (unless you use like machine magnets but takes a lot of energy to work them as well)
and electro magnets use leccy, so pointless.
electricbluebadger:
Impossible..... simple physics
energy cannot be created or destroyed... perpetual motion is impossible.
Cheers Steve
clbarclay:
May just be me being cynical, but in that clip you never see the other side when its accelerating, only when decelerating, so the easy way to produce that video is to have a motor on the back side with something like a push on friction drive coupling, get it spinning, remove the motor and then move the camera to show the back side.
Perpetual motion is a nice idea, but in the words of homer simpson "In this house we obay the laws of physics"
I like this theory for perpetual motion
http://www.youtube.com/watch?v=wvRzWYCZ2e0
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