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- How does gravity work underground? 4 answers
I've heard few explanations, but none in good detail that make it clear to those with less mathematical knowledge on the equations of complex physics.
I would like to think that since you are on the surface of the Earth, for example, everything, at least from my introspection, seems to be "pulled" towards the center of the celestial body itself.
If that is true, and everything, including me, is being pulled towards the center, and our (human, for example) bodies use skeletal muscles to maintain supportive structure to fight the gravity all the time (when awake), how can there be no gravity within the very center of the Earth?
It just seems hard to believe that something attracts you to it with energy, yet it has no energy in its core (gravity) to do this. Where and why does gravity stop at the center, and how does that make good, detailed sense for an average to relatively understand?
Also, taking in to accounts with centers of mass, wouldn't the Earth's core be the "center of mass" in this sense?
I mean if the energy or force "gluing" us to the Earth is not caused by the Earth itself, how come we are "pulled" towards Earth in particular?