Why gravity cant be cancel in the planet?

Question

Well you know, the astronauts train by simulating antigravity in a plane, with a big fan or in a big swimming pool, but why they havent create an antigravity chamber or something like that. Something that eliminates the gravity attraction in a place of the planet.

Answer 1

In simple terms, gravity only "pulls." It does not repel (have a conteracting force). Without an existing counteracting force to cancel gravity's pull there can be no shielding of gravity (unlike for electricity which both pulls and repels).

According to the currently accepted best theory of gravitation, Albert Einstein's General Theory of Relativity, there is no gravitational shielding. Gravitational shielding is also absent from Isaac Newton's classical theory of gravity. Astronomers performing solar system calculations would use one of these two theories and would therefore not include gravitational shielding.

In order to continue to be accepted, the General Theory of Relativity must repeatedly survive experimental challenges. Scientists look for anomalies, differences between theoretical predictions and actual experimental results, during eclipses.

A recent (2001) paper by C.S. Unnikrishnan et al. PhysRevD.63.062002 is titled "Anomalous Gravity Data During the 1997 Total Solar Eclipse Do Not Support the Hypothesis of Gravitational Shielding".

So far, it appears that no evidence for gravitational shielding exists. Thus, if you stand on the opposite side of the earth to the moon you will indeed experience the pull of gravity from both the earth and the moon.

Answer 2

Creating a localized variant in the gravitational field would necessitate having a horizontal gradient in the field. IF this were possible, then it could be used to get free energy (for example by raising a mass where gravity is lower, moving it horizontally without having to do any work on it, then dropping it where gravity is higher). Any situation where the strength of the field changes as you move in a direction prependicular to the direction of the gravitational acceleration would have this result, violating the most basic and fundamental law of physics- the conservation of energy: energy can be neither created nor destroyed, only converted from one form to another. If there's no way to create energy out of nothing, then there's no way to create "antigravity".

Answer 3

Gravitation is a strange force in the sense that, unlike the other three Fundamental Forces (strong nuclear, weak nuclear, electromagnetic), gravitation doesn't repel. This is because there is no such thing as positive and negative gravity to attract. All matter attracts all other matter, so as far as we know, gravity cannot be turned off. However, microgravity can be simulated with planes, fans, and water tanks.

Answer 4

Its possible to create an anti gravity chamber, but would take a lot of work....

get your shovel and start digging a room at the centre of the earth.

As the gravitational force is only caused by the amount of mass inside of a sphere, an empty sphere at the centre of the Earth would have no gravitational field inside it.

But it would be bloody hot though.

Answer 5

There is no known way to reproduce the gravitational pull such as we feel from the Earth except by having an object the same size and mass as the Earth.
Gravity always attracts. There is no known example of gravitational repulsion to cancel it.

Sorry!

Answer 6

It's not possible because gravity warps the fabric of space, you can't escape the fabric of space. Even when you venture outside of our atmosphere, you actually haven't escaped our gravity field, it's just weaker the further you get from the center of the earth's gravity. The gravity field of any object extends to infinity.

Answer 7

Gravity is an attractive forve between all matter. It cannot be negated.

Answer 8

well i think that thare has not been enough research. i think that if you wore a metal suit and hung an electromagnet above you you would fly