If you really wanted to go for realism, there would be NO GRAVITY at the core. :P
As you dig down you would get lighter and lighter on your feet.
Any mass you are below (within the sphere of Earth) will exert a gravitational pull in one direction, while the mass above you (also within the Earth) will exert an equal and opposite pull.
If earth was just full of water.... as you swam deeper and deeper there would be more and more pressure upon you. Would there be a point where that pressure would start to lessen as the water is pulled in all directions?
> pressure would start to lessen as the water is pulled in all directions?
the pressure would never lessen, just increase slower.
The gravity at the center is zero, but the mass above you is not exerting just gravity force (which gets cancelled out by the opposite side), but also pressure (from the weight of it falling down).
This means the water pressure would steadily climb, but at a slower rate as you move nearer to the center, and will be at maximum at the very center.
Correct. Gravity would be net zero but the pressure would be the entire worlds oceans.
Awesome question!
Yeah, I'm mostly aware of that. Weird didn't mean 'wrong' in this case, just weird for a terrestrial-bound human. :)
There’s all sorts of weird physics in the universe ;)
>As you dig down you would get lighter and lighter on your feet.
Fun fact: Gravity doesn't decrease the entire way down! Only when you get to the core does it decrease monotonically: https://physics.stackexchange.com/questions/18446/how-does-g...
If you REALLY want to aim for realism, gravity should depend on all quads on the planet. So, if you were to build a huge floating island, the gravity between it and the planet would be less than the usual
If you really truly wanted to aim for realism, digging to the core would require a huge budget and an international coalition that would get bogged down in politics and mismanagement and it would never happen.
30 year pension plan.
That's how it's implemented in the game!
Just a thought; I do wonder in reality if there is an actual single physical point that has any form of material but totally zero gravity. I think anything, as longs its size is above the planck length, has some gravity.
If nothing else, your own body will exert some gravity on you.