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Sable-Keech t1_j124fcs wrote

Reply to comment by 5J7XM33IXN4XCQI6B2BB in Could being submersed in a sealed tank of fluid help humans survive heavy G acceleration in outer space? by cheeze_whiz_shampoo

It would help to a certain extent. In water, the acceleration force would translate directly to pressure such that if you accelerate at 1g you would feel the same amount of pressure as you would underwater on Earth.

So assuming you’re under a meter of water onboard the ship, you could easily go up to an acceleration of 40g since then the 1 meter depth would be equivalent to being at 40 meter depth on Earth which is an okay diving depth for recreational divers.

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5J7XM33IXN4XCQI6B2BB t1_j13rtdq wrote

This is inaccurate.

The hydrostatic pressure gradient is 40x as extreme, so it's more like being submerged in something 40x as dense, not 40x deeper. For reference, molten lead is only 10x as dense as water.

The buoyant force is equal to your weight, to kee you stationary. No matter the depth, on earth, it's always about 200lb. Under 40g, it would be 8000lb.

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Sable-Keech t1_j13sk1u wrote

Huh, I thought acceleration was so similar to gravity as to be virtually indistinguishable.

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