Answer to Question #80514 in Physics for Nishan

Question

Will gravity increase if we dig down? Explain.

Answer 1

No, it will decrease. Newton’s Shell Theorem proved that inside a hollow sphere, you will feel no net gravitational force regardless of your location within the sphere.
An extension of this theorem is that inside a sphere of constant density, the net gravitational force diminishes as you get closer to the center. At the very center the net gravitational force is zero since you are equally pulled in every direction.