Could a perpetual motion machine be made using a filling buoyant object that sinks when filled and releases when bottoming out?

Question

Could you make a perpetual motion machine via buoyancy? If you started with 2 types of fluids with different buoyancy. Then add a buoyant object capable of filling with the top fluid where it closes upon filling and then sinks from the additional weight. Then when it sinks it bottoms out and mechanically vents some of the top more buoyant fluid, thus floating back to the top and refilling again. Would that work? I’m not a scientist obviously.

The answer to "Can you make a perpetual motion machine by X" is no. — mmesser314, Nov 04 '23 at 03:12
Possible duplicates: https://physics.stackexchange.com/q/556/2451 and links therein. — Qmechanic, Nov 04 '23 at 05:43

score 2 · Answer 1 · answered Nov 04 '23 at 03:52

2

when it sinks it bottoms out and mechanically vents some of the top more buoyant fluid

This part will always require more energy than was produced by the initial stage.

So, no.

answered Nov 04 '23 at 03:52

Dale

99,825

Could a perpetual motion machine be made using a filling buoyant object that sinks when filled and releases when bottoming out?

1 Answers1