How come gravity is used to calculate boyancy?

Anyone want to debate?

I don't know much about boyancy but ik flat earthers use it a lot

And I'm pretty sure gravity is in the equation

Well the g in the equation is gravity

If gravity wasn't in the equation then why are the tests accurate

Also boyancy is the tendency for an abject to float

Please explain why things fall if not for gravity

Is it not obvious that the earth is round? Look at the sun or the moon setting below the horizon

Or other things

Um

I have

I've seen it go completely below the horizon

And hours later it comes up on the other side

Not really

Even if I was surrounded by mountains that wouldnt explain how it sets on one side and rises on the other

Come on

Isn't it obvious

How come everything else in space is a sphere?

Like Mars

Or the sun

Or the moon

Or anything else

?

What no