zero gravity

[alpha2cen]

We think no gravity force existing state is a gravity-free state. At these states we feel the same feeling? Are there any difference ?

Edited October 20, 2012 by alpha2cen

[Scott82]

Are you talking about the case when two sources of gravity exactly cancel out each other?

 

I'm aware of 2 instances of this in nature:

 

The 1st is what we call the langrange points between any 2 orbiting bodies. At the 5 lagrange points the gravity of the 2 bodies neutralizes and allows anyone at this point to stay relatively at rest without falling towards either body.

 

The 2nd is theoretical in that I think it would only work in a planet-sized hollowed-out sphere. If you were within such a sphere, the gravitational faces exerted by it's inner arc should cancel out exact, leaving you free-floating.

 

Regarding your question, I don't think there would be any difference between a space where gravitational forces neutralize one another and a place where there is no gravity at all.

[JohnStu]

very different

 

 

 

 

 

 

[JohnStu]

Yes the person wouldn't feel anything.

 

In the case of a person in orbit (feeling of weightlessness) vs a person under 0 net acceleration from gravity are different. A human dies under 0 gravity I believe, especially adults. Either instantly due to blood over-rushing to brain and oxygen delivery problems or a slow death from indigestion due to severe endless dizziness.

[ACG52]

  Quote

In the case of a person in orbit (feeling of weightlessness) vs a person under 0 net acceleration from gravity are different. A human dies under 0 gravity I believe, especially adults. Either instantly due to blood over-rushing to brain and oxygen delivery problems or a slow death from indigestion due to severe endless dizziness

 

Do you have any kind of citation for this piece of nonsense?

[swansont]

  On 11/18/2012 at 4:43 AM, JohnStu said:

Yes the person wouldn't feel anything.

 

In the case of a person in orbit (feeling of weightlessness) vs a person under 0 net acceleration from gravity are different. A human dies under 0 gravity I believe, especially adults. Either instantly due to blood over-rushing to brain and oxygen delivery problems or a slow death from indigestion due to severe endless dizziness.

The astronauts who went to the moon seem to have survived.

[John Cuthber]

I wonder why JohnStu bothered to reply.

His replies contradict eachother (and also what's known from space travel.)

 

Anyway, there is a difference.

An object of non-zero size would be stretched a bit in all the cases except the first.

[alpha2cen]

Is the center of the Black Hole no gravity state?

[derek w]

  On 11/18/2012 at 4:43 AM, JohnStu said:

Yes the person wouldn't feel anything.

 

In the case of a person in orbit (feeling of weightlessness) vs a person under 0 net acceleration from gravity are different. A human dies under 0 gravity I believe, especially adults. Either instantly due to blood over-rushing to brain and oxygen delivery problems or a slow death from indigestion due to severe endless dizziness.

 

 

 

These are symptoms of zero atmospheric pressure,not zero gravity.

[alpha2cen]

Huge amount of high intensity beam makes no gravity?

Is there no attractive force between them?