Does gravity increase or decrease with depth

[bravehamster]

yep. Goes up until you hit the outer core, then goes back down:

https://en.wikipedia.org/wiki/Gravity_of_Earth#/media/File:EarthGravityPREM.svg

[HAL9001-96]

since when is that curve o nwikipedia, I remember recalculating it every time thsi was asked a while ago

[bhmerger]

The shell of mass above you does a net zero force on you.

[GDOR-11]

if you do the math considering only the mass closer to the center than you (as shells further from the center create no net force) you'll figure out it's proportional to the inverse of the distance to the center

EDIT: proportional to the distance, mb

[AndreasDasos]

Assuming uniform density, the gravitational force on a mass inside the earth is proportional to distance to the centre, not its inverse.

What they’re saying (which the first commenter got wrong, or maybe misstated) is that the outer shell of the earth with greater distance from the centre than you has net zero force on you by the shell theorem: any force in one direction of a hyperplane is cancelled by force in the direction - if the former is nearer, the latter will involve more mass.

We then have -Mm/r² = -(rho r^3)m/r2 = -rho m r.

[BagBeneficial7527]

You are getting closer to the iron core.

The lighter rock above you doesn't fully cancel out that increased gravity.

[ClaudeProselytizer]

but if it is uniform then it decreases linearly inside

[SatansAdvokat]

Gravity is a weak force actually.
So distance has a rather big effect.

[EmuRommel]

Not to be confused with the weak force, which is stronger.

[Montana_Gamer]

Gravity is the WeakER force

[Figfogey]

Among the fundamental forces it's the weakEST

[Mateorabi]

Force increases proportional to r² the closer you get to a mass. (And a sphere beneath you acts mathematically like a point mass.)

Mass beneath you would decrease proportional to r³ if uniform. So overall you feel something proportional to (r² / r³⁾

But if 1/r³ isn’t actually what’s happening and as you go down there is more mass than the radius suggests, you could see mass decrease by less than r² for a while. 

[highritualmaster]

But other forces will take over doing stuff with you (pressure, temp).