Why is the pressure at the center of the earth higher than on the surface?

664 views
0

If I stand on the surface of the earth, 100% of it’s mass/gravity is pulling me in one direction, “down”.
If I’m at the center of the earth, isn’t the same mass/gravity equally distributed in all directions now, making me effectively weightless?

In: Physics

Pressure is stuff pushing on you. If you stand on a chair vs hold a chair above your head there is a big different in amount of stuff pushing down on you (one chairs worth).

At the center of the earth there is one earths worth of stuff pushing down on you.

Okay, look at it a little differently, the earth is not ‘pulling you down’, it is actually ‘pushing you up’ at a constantly accelerating rate. We can call that 1 G. You do feel pressure because all of those air molecules are also being pushed upwards with you, but since they are traveling ever-so-slightly slower than you are (as your feet are planted on the ground and the gas is floating) you feel air pressure. If you are at the core, which is molten iron, the literal weight of the iron will be your pressure. Your tendency will be to pin against the solid surface at the edge whereas the iron molecules will try (and succeed) in holding you in place. Since there are a lot of iron molecules and they are densely packed, you will experience tremendous pressure.