> In the vacuum of space, if your body begins to spin, a force will pull your arms away from your from your body.
I think this is the easiest to explain, because it's built on the others (specifically inertia). For some point in your spinning, your arm moves in some direction. Your center of mass changes its direction of movement, because you're spinning. Your arm still goes in the direction it was initially moving, pulling itself outward as the less floppy part of the body follows the spin inward a bit better. Your arm (and all your other parts) is just "trying" to go "straight", due to inertia, and can achieve it better than your other parts, because it has an easier range of motion to do so.
Inertia and gravity themselves are more fundamental, and certainly fit your descriptions (to my limited knowledge). We don't know at what level things in the universe are fundamental, instead of explainable by some additional turtle underneath. Hence we start smashing subatomic particles to see what's there.
I have no clue how science even could determine if some mechanisms are the "root" ones and not just derivative of something else. There's no guarantee that the physical workings of the universe make any sort of sense.
I think this is the easiest to explain, because it's built on the others (specifically inertia). For some point in your spinning, your arm moves in some direction. Your center of mass changes its direction of movement, because you're spinning. Your arm still goes in the direction it was initially moving, pulling itself outward as the less floppy part of the body follows the spin inward a bit better. Your arm (and all your other parts) is just "trying" to go "straight", due to inertia, and can achieve it better than your other parts, because it has an easier range of motion to do so.
Inertia and gravity themselves are more fundamental, and certainly fit your descriptions (to my limited knowledge). We don't know at what level things in the universe are fundamental, instead of explainable by some additional turtle underneath. Hence we start smashing subatomic particles to see what's there.
I have no clue how science even could determine if some mechanisms are the "root" ones and not just derivative of something else. There's no guarantee that the physical workings of the universe make any sort of sense.