You're on a planet with, say, 70% Earth gravity and a swimming pool (fresh water.) Your body density remains

Question

the same.

Do you float and swim more easily (because the gravity is less),

OR

do you tend to sink and must work harder to stay on the surface (because you are denser than an equal volume of water under the reduced gravity)?

[Yes, there's enough air to breathe for purposes of this discussion.]

Thanks for all serious answers!

Answer 1

It would be easier for you to swim since your muscles would still be used to Earths gravity. However if you remained on the planet atrophy would make your body act the same as if were on Earth.

Answer 2

Archimede's principle is that the bouyancy force upwards is equal to the weight of water displaced. Because gravity is weaker, the counter acting bouyancy force is weaker. Therefore the weight of water displaced is less. Because the specific gravity of water is the same, the volume of water displaced is less. This means that you can ride higher in the water and swim more easily.

Answer 3

Your specific gravity would stay the same as the water would also.
It would be the same as on earth.

Answer 4

density is mass/volume. Neither is related to gravitational acceleration; therefore your specific gravity (density relative to water) remains the same.

Answer 5

Neither. It feels the same. You weight 70% less but the buoyancy of the water is also 70% less.