Can we create Gravity?

[The_Big_K]

Originally Posted by suyash

awesome reply in such an interesting topic !!

...I feel bad about the sorry state of Indian engineers.

[ranvir1986]

Hi every one.
I have an answer to this one, atleast for a specific purpose. Artificial gravity is a requirement in future space settlement plans, a lot of the same is discussed in NASA space settlement design contest held every year.

The best means suggested by most entries is to rotate a container at a desirable speed and the objects within it shall feel a force (centrifugal) pushing them radially outward. If this container was huge, say in Kms of dia, then a human inside would actually feel as if he was under gravity. The radius of the container and speed of rotation are the parameters that decide the amount of ARTIFICIAL gravitational pull.

[vissin]

Oh my! I don't wish to sound rude but this thread is definitely not for a young student looking for some serious learning. There's so much of incorrect statements here. I'm lost I don't even know from where to start.

Well, I used to be much interested in all the fundamental forces and I'd studied them well during my school days. I don't remember it all too well, but just a few points below from what I read in this thread:

1) (To answer the original question) Yes it is believed by many to be possible to artificially create gravity. The practicality of it is an altogether different story. Look at gravity as nothing more than a curving of the space-time continuum and you might just be able to imagine it (or maybe not). Gravity is also linked to velocity in some cases.

2) There has been mention of negative gravity. Although, it's all only in theory.

3) (crazy_anoop) Gravity is not only between heavenly bodies but between any two masses (including you and me). However, being a weak force it is not perceptible between you and me. There are many other stronger forces around us. If you remember the basic formula of gravitaion, G is proportional only to Masses and inversely to distance between the two masses.

4) Zero gravity is created yes. But by neutralizing gravity with some other force. Much like adding -2 to 2 to get 0 for result. (Explained by Ranvir above me)

I strongly believe that all the 4 fundamental forces be it gravity or strong or weak or electro-magnetic are somehow inter-related. I'm reminded of a quote I read by Bohr, "Physics don't tell us about what is, but what we can say to each other regarding the world around us"

[Dexter_Neo]

hmmm this seems a very old thread but anyways..........Now when we say can we simulate gravity what xactly r we refering to?
r we refering to the force of attraction by earth on other bodies or r we just refering to any sort off attraction.....?


now Earth has attraction coz of magma revolving around its core.now can we really simulate the cocepts of ionization and magnetism????/
if the ans is yes then yes we can simulate the gravity........and the ans is no then we cant i guess its evident.........

[vissin]

Well Dexter_Neo, 'magma revolving around it's core' is what gives Earth it's magnetic dipoles. It's not related to Gravity. Gravity is fundamental to mass. As I've already mentioned in my previous post it's present between any two bodies of mass.

When we speak of creating gravity it should be understood that we are speaking of artificial gravity say, for use in a space-ship. Your point is very much valid that we don't really create it but only simulate it's effect by creating some other kind of force.

Our understanding of Gravity is still very little and we are yet not sure about what causes gravity. The search for "Graviton" is still on. Some physicist claim to have clues on it. And maybe if we find 'Graviton' we will be able to manipulate gravity. (One way of creating it)

[diva]

hey...wat is the need of gravity now wen we already got one?why dnt we think of creating zero-gravity areas/parks...wow...hw nice it will be to float like a feather?mm...we can create gravity between objects; also zero-gravity.actually attraction of objects towards planet is called gravitational force.so to create attraction btw objects is possible and thats what u meant,rite?

[The_Big_K]

Going back to textbooks, force of gravitation exists between any two masses and its directly proportional to the product of two masses, inversely proportional to the square of the distance between them.

Gravity, thus, exists! The discussion should continue on creation of Zero Gravity area on earth. What do you say, fellas?

[xheavenlyx]

Ok, I thought we were talking about creating artificial gravity on space station for human living.

Space stations, yes its possible to "create"(actually induce?) artificial gravity as ranvir as pointed out how (above).

As
for zero gravity! I wish it was here presently, but I dont know how we will achieve it in the future.