FlyHandler t1_j163n8y wrote on December 21, 2022 at 10:59 PM

Reply to comment by labroid in Could being submersed in a sealed tank of fluid help humans survive heavy G acceleration in outer space? by cheeze_whiz_shampoo

I think we need to make a small experiment to figure this out. I don't think it matters wether it's in space ore here on Earth.

Take e.g. a small plastic container and fill it with water so it's about the same density as water. Put it into a bucket of water. Rapidly push the bucket sideways to see if the bottle inside moves with the water or if it crashe sagainst the bucket wall.

Any volunteers?

If the container doesn't crash into the wall, the water provides no damping so the human would not benefit anything from being submerged.

If the container does crash into the wall the water would slow the human down but the human would hit the tank wall at some point if the acceleration lasts long enough.

labroid t1_j16938b wrote on December 21, 2022 at 11:39 PM

Sideways isn't the same thing. Newton's first law says the water will slosh out and the object will try to stay still relative to 'the universe' as the glass moves. If you move the glass up, however, the buoyant forces will increase. If the object if floating, it will continue to do so.

So do your experiment accelerating upwards. Of course it will be a mess when you stop :-)