That’s why weight changes but the amount of matter doesn’t

pressure is defined as force over an area

if you believe Newton's laws, weight is a force.

definition of weight found in introductory physics textbooks defines weight as the force exerted on a body by gravity

also to increase your weight you need an increase in matter

http://hyperphysics.phy-astr.gsu.edu/hbase/mechanics/imgmech/weightf.gif

both points you stated I believe are false

Idk how people talk about Archimedes principal when it is defined in terms of weight, and weight is itself a force

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid.

a simple experiment in a centrifuge will show applying more force will cause a solution of solvents of different densities to separate faster

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showing how Archimedes principal requires a force to actually work

I'm sure you could design some free fall experiments with rapidly sedimenting objects in a solution to show this, but it should be obvious. In free fall the solution will kind of just fall and wobble about all at the same rate, not separating

@Fran it requires downwards acceleration

or any acceleration, as your centrifuge shows

and you can define a force for any movement

but it doesn't require the theory of gravity

@raspberry yes and I have heard people say gravity can instead be explained by Archimedes principal which I was trying to show as not really making sense

@Fran @Wendigo sure, i think buoyancy is an effect of things falling. not a cause

but, just saying, you don't need gravity to have the fact that things fall

hm? that sounds like 2nd law of thermodynamics, instead of buoyancy

well they are related

ok now i think i see what you're saying. the pressure gradient of earth's atmosphere, i think that'd be a result of buoyancy bork

i guess things fall, then that causes buoyancy and the atmosphere's pressure gradient, and all wheter or not there's a globe and gravity

most people say buoyancy completely ignoring the pretty much indisputable fact that buoyancy acts under the assumption of a force

@raspberry What does buoyancy have to do with increasing entropy?

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What cat said

one person told me we could also be spinning in a circle and gravity is actually a mix of gravity and acceleration from centripetal force

Hey Demon! @demonwarrior2266

the acceleration change would near match that of gravity

@the21cat in globe earth centripetal force is a real thing

like up at mt everest

you guys steadily coming over to the dark side, huh? yup, there's actual debates to be had here.

yeah but im saying the one person said the whole earth is flat and spinning about a point really fast

they probably just claim it doesn't exist.

as radius (height increases) decreases force actually decreases

they do undeniably

I like arguing just about Newton's laws...

like usually people will say something contradictory to them