Re: is perpetual motion possible ?

johnny_t wrote:
Kyle T. Jones wrote:

First, you do realize that the most common definition of a "perpetual motion" machine is one that achieves over-unity operation, right? You aren't looking to do that, at least.

Well Yes.


So you come up with satellite examples and the such. Look, in order for you to achieve this perpetual motion machine, even one with the much less lofty goal you seek, you need a completely isolated system. Not going to happen.

Well, duh. However, it was an attempt to cheat as common to use gravity as an energy input. Many of these devices are gravity, magnetic, spin, or vortex based.


Well, there's the problem, I think. Assume that you could use gravity as an energy input. Why would this device then count as a "perpetual motion device"? What makes it different from a million devices that use electricity or some other energy input? You don't count those as "perpetual motion device", right?

I think the entire idea is to get something that will stay in motion without *any* energy input, right?

Do you think our galaxy qualifies as a perpetual motion machine? Of course it doesn't. Just a "really, really, really long-term motion machine" that will, itself, run down on long-enough time-scales. This is true for anything you've envisioned, or at least anything you've suggested in this thread, as well.

Any motion longer than civilization, counts in my book. And if the universe ever collapses we are back to it.


How in the wide world of sports do you know how long "civilization" lasts?

So if I come up with an atomic battery that can power a spinning gyroscope in space for a billion years, you'll call that a perpetual motion device?

We are definitely arguing past each other, as we have radically different interpretations of what qualifies as a perpetual motion device.

Cheers.
.

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