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Re: Derive energy from angular KE of earth?



I don't believe it is the same thing. The tides get their energy from the
earth -moon interaction, and that ends up transferring angular momentum to
the moon. The earth is losing angular KE and therefore angular momentum, but
the moon picks up the momentum.

Fred Bucheit

From: Mark Sylvester <msylvest@XNET.IT>

I suppose a related question is how the conservation of angular momentum
applies in the case of a tidal power plant, which must also take energy
from the rotation of the earth.

Mark

At 02:48 22/12/03 +0000, fred bucheit wrote:
> A gyroscope wheel is mounted in a gimbal so that the spin axis of
the
>wheel maintains a direction that is constant in space and so that this
axis
>is perpendicular to the spin axis of the earth.
> The axis of the gyroscope wheel will appear to rotate once in 24
hours
>because of the earth's rotation.
> The gimbal can be mounted in such a way that the spin axis of the
>gyroscope wheel can move in one plane only, a plane perpendicular to the
>spin axis of the earth (the gimbal's axis is pointed at the north star
and
>the bearings that support it are mounted within posts driven deep into
the
>earth).
> If one applies enough torque to the gimbal, its rotation relative to
the
>earth can be stopped completely. If that torque is diminished a bit,
there
>will be a torque acting through a distance, which does work. Thus, work
>derived from the rotational KE of the earth. This may not be a clear
>explanation of what I have in mind, so I built a model and took pictures
>that will make my idea more understandable. I will emial the 2 pictures
to
>anyone who is interested.
> It is obvious to me that this system will produce work as a result
of
>the relative motion between the earth and the gimbal, but it appears to
>violate some basic laws-conservation of angular momentum of the earth.
Would
>someone give me some ideas on why this will or will not work?
>
>Fred Bucheit retired Physics teacher.
>
>_________________________________________________________________
>Enjoy the holiday season with great tips from MSN.
>http://special.msn.com/network/happyholidays.armx

Mark Sylvester
UWCAd
Duino Trieste Italy

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