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/sci/ - Science & Math

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1795617 No.1795617 [Reply] [Original]

http://www.metacafe.com/watch/1556420/perpetual_energy/

what is wrong with this video?

pic sorta unrelated.

>> No.1795630

shameless self bump.
perpetual energy?

>> No.1795649

I'm okay with this.

>> No.1795650

Can someone explain to me how I'm an idiot for thinking this actually works?

>> No.1795653

oh god is this that "glue magnets to a plastic lid" thing again

>> No.1795685

inb4 "it will run until the magnetic fields are gone"

>> No.1795692

It won't work because for every magnetic attraction there will also be a magnetic repulsion. The magnets around the lid are symmetrical, so for every north pole being attracted to the external magnet, there will be a south pole being repelled. It will balance out to zero.

If you build this thing, it will not turn continually. It might turn a fraction of a revolution to settle into the lowest-energy state.

>> No.1795694
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1795694

>> No.1795877

so why does the wheel spin in the video?

>> No.1795909

>>1795877

Clearly a magnetic coil under the table