It's not magic, the object has more mass and density than the air, so a force must be used on it, in order to lift it up off the ground, or throw it up into air.
Without a force to do so, it is magic.
Yes, the object is more dense than air. So what?
Why should that mean it falls down?
Why would objects of mass, MAGICALLY RISE UP INTO A MEDIUM OF LITTLE MASS AND DENSITY? That makes no sense at all.
Why should objects magically fall, for no reason at all, with no force acting? That makes no sense at all.
What proves it is due to relative density, is that all objects, heavy or light, all fall through the air at the same rate, accounting for air resistance, etc.
Just how does that prove it is due to relative density?
If anything, it proves the exact opposite.
If it was relative density you would expect it to change depending upon the density, so as the density of the object increases, as this means the difference increases, the acceleration would increase as well. But it doesn't.
Likewise, changing the density of the fluid would also change it.
Conversely, a force based upon mass would mean basically the same acceleration for everything once the buoyant force becomes negligible.
But if there WERE a force, it would pull them down at different rates
Why?
Stop just asserting BS and try explaining why.
If it is a force based upon mass, then F=k*m.
And a=F/m, so a=k*m/m = k.
i.e. it would be constant, regardless of mass.
and at different heights, since the SOURCE of any force weakens with more distance from it
And it does.
The rate of acceleration varies around Earth, and with altitude.
But you need to use the distance honestly. That means using the distance from the centre of Earth, not the surface.
Insects will fly above Earth easily, that's your great force, which can't hold down tiny insects to Earth?
Take their wings off and see how great they can fly.
They have a small mass, so the force is small, so they can easily overcome it with wings.
We have much greater force than an insect, but we cannot fly into air.
We have a much greater mass, meaning we need to apply more force.
But notice that we can still fly, such as by building a plane and using engines to propel it forwards.
Even if we attach wings on our arms, and flap up and down like a bird, we cannot fly up. We use much more force flapping our 'wings' than birds use, so why can't we fly up into air like a bird?
As above, we have a far greater mass, so there is a greater force, because the force is proportional to mass.
Because we have far more mass and density than birds do, that's why we can't fly up into the less dense air like birds can. It is due to relative mass and density, once again.
Pure BS.
And trivial to refute.
Go get a few large balloons and strap them to you to lower your density. Feel free to drop it all the way to below birds, while still significantly above that of the air.
Then try attaching some wings and flapping to fly.
A magnet pulls in a small nail faster than a large nail, right?
No. It depends upon many things.
A wind blows a small object further than a heavy object, right?
No, it depends upon the area to mass ratio.
If you keep the ratio the same, the acceleration is the same.
That's what actual forces do, they act more or less on objects, based on their mass and density, and so forth.
And gravity acts based upon their mass, which results in an acceleration that doesn't depend upon mass.
We FEEL any force acting on us
Acting on US, or on an object we are holding?
What we feel are forces being transferred through us.
we feel a nail we hold being PULLED IN by a magnet
And we feel a heavy object being pulled towards Earth.
There's nothing felt pulling us down when in air, from below us.
And if you were magnetic, you wouldn't feel a magnet pulling you in, because it acts all over you and doesn't need a force to be transferred.
We can dangle our leg into air off a ledge, and no pull on our leg is ever felt from a force below us.
You are just used to it.
If you would like a better example, hold your arm out straight.
Attach a string to our dangling leg, and pull on it from below, and we DO feel a pull from a force below us, right?
This depends on how much you pull.
If you pull with a small enough force, you don't really feel it.
Notice that to feel that pull, you can just dangle a weight. But if you just dangle a string, you don't feel it.
And unsurprisingly, that depends on the MASS of the object, not its density.
As if there is a force acting based upon mass.
Your force is made up BS, proven so easily, so conclusively, it takes a string, or a magnet, and you are blind to such obvious proof it's made up BS, you cannot see it!
Yet you are entirely incapable of proving it is BS.
Instead, you just need to repeat the same pathetic lies that have already been refuted.
Conversely you STILL can't explain why things fall down.