Is there any place with no gravity force on earth ?

Question

Is there any place with no gravity force on earth ?

Answer 1

There is no place on Earth without gravity. However, you can experience zero gravity without leaving the planet.

The starting point for general relativity is the equivalence principle, which equates free fall with inertial motion. The equivalence principle states that inertial effects are not “like” gravity or a simulation of “real” gravity; they are the same force.

When you are in freefall, the inertial effect is zero, the same as zero gravity.

You can experience this freefall whenever you jump into the air (except for the air drag). Also an aircraft ride (called the “Vomit Comet”) can let you experience freefall.

Answer 2

Yes and no. Technically, there is no place in the entire universe that is completely free from gravity. You are in fact being tugged on by single atoms at the other end of the galaxy, but their effect is too small to observe.

If we consider only Earth, there is one place where there is "no gravity" - the dead center. At this spot, you are being pulled equally in all directions, so all the forces cancel and you would be "weightless" - if you could survive! Furthermore, you'd have to find the center of mass, not the exact center. For example, the side facing massive objects like continents or Mt. Everest would tug a tiny bit more, but again, you probably wouldn't notice.

EDIT - note on gravity wells. A gravity well is pretty much taken to be the area where that bodies gravity is dominant. For example, along the line going to the moon, there is a point where an object (such as an Apollo spacecraft!) stops slowing down due to Earth's gravity and starts speeding up due to the Moon's gravity. However, this point is very close to the Moon.

Answer 3

Well there are these things called gravity wells. The earth has gravity wells that exist out in space, however the moon should have gravity wells as well. So i have never done the calculations but I have often wondered since the moon orbits the earth(and vica versa), then the moons gravity wells are variable and therefore might intersect the earth in its interior or in the sky somewhere, or maybe even the surface but I doubt it