Value of g force at centre of earth?

Answer 1

Actually, that is a good answer. At the actual center of the Earth, there is zero gravitational acceleration. After all, where would you be pulled toward?

Answer 2

0. Zero.

Not infinitely positive or negative. Just zero. You cannot apply the equation that applies to point mass. F = GMm/r^2 because you would not have a reference point of mass M. In fact, not just the centre of the Earth, but any point below the earth's surface, because then there would be mass above that point as well as around.

Imagine digging a hole right through earth, from one side to the other. If you dropped something in that hole, it would fly all the way to the other end, then be attracted back again to the centre of the tube, and then due to conservation of momentum it will fly all the way to the other end again, like a mass oscillating on a spring up and down, in simple harmonic motion until air resistance slows it to a halt at the centre of the earth.

Answer 3

Most of the answers to this so far are correct. The more interesting question is: what is the apparent force of gravity at any point interior to the earth (not just the center)? Answer: equal to that generated by a sphere, centered at the earth's center, and passing through the point in question. At the center of the earth, the radius of the sphere is obviously zero, and so is the net gravity,

Answer 4

g force represents the sum of all the attractive forces between all masses in the system, being at the center of earth would mean that all the mass surrounding you attract you with a force equal and opposite in every direction. The answer is "0" but not because there is no force, but because there is equal and opposite force in all directions, which is implied by being in the center.

Answer 5

At the center of the earth the g force would be zero becuase equal amounts of the earth's gravitational force are pulling you from all directions.

Answer 6

If you perform the calculus involved, you find that gravitational force increases linearly from zero at the center of any sphere to it's "full" value at the surface, then decreases in inverse proportion to the distance from the center.

Answer 7

If you could somehow tunnel down there, and be safe from the heat and pressure, and were in the exact center of the earth, you might experience this to be a zero gravity environment, because you would not be "falling". This is different from a real zero-G environement because your local frame of reference (momentum) is still that of the earth. For example, the earth will continue to rotate around the sun with you inside of it. In that sense, the Earth's gravity has still captured you and you are still feeling the full G force.

Appendix: Gravity is created by a "depression" in space time. As mass accumulates in one spot, the depression increases and creates an energy gradient where it is easier to slide "down" that gradient (ie into the gravity well). To suggest that there is no gravity at the very center of a gravity well is shortsighted at best. All it means is that you've fallen into the lowest point in the depression and the gradient is equally "steep" in every direction around you.

Answer 8

The gravitational pull is by using allure of two hundreds. The earth is a sphere of extensive mass of radius R. assume a mass is on the outdoors of earth. If we predict of a horizontal airplane floor under the mass, on one ingredient of the airplane there is the extensive earth and on the different ingredient is the mass. The allure of the mass is in direction of the middle of earth. If we evaluate a mass on the interior ingredient of the Earth and if we, returned evaluate a horizontal airplane floor under the mass, now there's a ingredient of earth is on one ingredient of the airplane and yet another small ingredient is on the different ingredient of this airplane. subsequently the mass is pulled in direction of the middle via the huge ingredient and likewise pulled in different way via the small ingredient of earth. the internet stress is small whilst in comparison with the case whilst the mass became on the outdoors of earth. it relatively is seen via the above attention the stress on the middle would be 0.

Answer 9

"After all, where would you be pulled toward?"

You would be pulled toward the 4th dimension. It isn't the mass that pulls you but rather the distortion of time/space created by mass. In the center of the earth you would be sitting at the "bottom" of the of the pit or distortion in the 4th dimension so gravity would be at its strongest at the center.