Can a Gravity Machine Harness Energy in a Frictionless Universe?

[Mattius_]

Can one harness gravity mechanically? meaning, in a frictionless universe, can we have an object undergo the forces of gravity, extract energy via a generator (ex. mass falling onto a spring which generates electricity), and reciprocate this while also producing excess energy? Is this possible, impossible, or still in debate?

 

[chroot]

No, not even in a frictionless universe. Gravity is a conservative force.

- Warren

 

[Mattius_]

can you please explain this a little more, i am not very smart...

 

[chroot]

That's okay. Here's a good link:

http://hyperphysics.phy-astr.gsu.edu/hbase/pegrav.html#cfor

- Warren

 

[Mattius_]

Lol a rather simple solution, not exactly what i was looking for, i was taking situation exemplified in hyperphysics with an additional force of gravity in only one direction... can we neutralize gravity for one path?

 

[selfAdjoint]

Nope.

 

[Mattius_]

you can with a magnetic field...

 

[brentd49]

How about hydroelectric power from a waterfall ;)

 

[FZ+]

Hydroelectric power is really just indirectly harnessing energy from solar radiation - having it evaporate water, lift it, and then letting it fall under gravity.

 

[chroot]

And no, Mattius_, you cannot build a free-energy machine with magnets either.

- Warren