system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Would gravity change as you get closer to Earth’s center?
gpt
Yes it does. The force of gravity comes from the mass of all the rock under your feet. If you start digging down there will be rocks over your head pulling you upwards and less rock under your feet pulling you downward so the force of gravity is reduced. If you are able to get to the center of the planet there is just as much rock in all directions so the force of gravity is zero.