0 Members and 1 Guest are viewing this topic.

The talk of zero g refers to an objetc in free fall- since it's already following gravity, gravity doesn't have an aparent effect. Of course since gravity has an infinite range there is always a gravitational field everywhere. But if you are far enough away from things the effect is small.Also, re"Why planets Revolve around sun why not fall towards sun?"They do fall towards the sun, but they keep missing; that's why they stay in orbit.

Until you learn something about gravity you would be well advised to refrain from sayig things like "BTW do u know what I am talking about ?"or "And who told u that G force is ∞ range ? huh ?"F= G M1 M2 /R^2for exactly what value of R does G reach zero?Anyone else able to solve that without setting R= infinity?

The space shuttle still has pretty much the same velocity as Earth, which is why it doesn't fall into the Sun. Well actually they are still falling but as BC said, they keep missing.Imagine swinging a ball around in a circle with an elastic string, the elastic (gravity) is always trying to pull the ball (earth) to centre (sun) but the speed of the ball and the force of the elastic are at an equilibrium where the ball will maintain its distance from the centre. If you stop the ball it will be pulled inwards by the elastic, the same would happen to the Earth or the space shuttle if you somehow removed its velocity relative to the sun.

ok what will happen if it doesn't have same velocity as earth ??

If you stop the ball it will be pulled inwards by the elastic, the same would happen to the Earth or the space shuttle if you somehow removed its velocity relative to the sun.

why do we call zero G force ? what about suns G force ?

The talk of zero g refers to an objetc in free fall- since it's already following gravity, gravity doesn't have an aparent effect. Of course since gravity has an infinite range there is always a gravitational field everywhere. But if you are far enough away from things the effect is small.

I didn't meant you as ignorant ok...I just said it because you truly didn't understand My question and others too.

why do we call zero G force ?

And you should not use math at 100% in physics like ( 1/0 is infinity no radius and no mass can u tell me a mass with Zero radius ?).

Quote from: ScientificBoysClub on 27/05/2009 12:19:36I didn't meant you as ignorant ok...I just said it because you truly didn't understand My question and others too.I think it would be helpful if you made allowance for the fact that you are posting in what is your second or third language. Consequently your intent and meaning may not always come across clearly. Be more tolerant when people fail to understand you. (My opinion is that if someone fails to understand me it is 90% likely that I have failed to express myself clearly. Only in 10% of cases will it be the fault of the reader.)You have made much of the fact that you are discussing Einstein's take on gravitation, not Newton. However, in terms of planetary and satellite speeds Newton's approximations work perfectly well. Certainly NASA don't make allowances for relativistic effects when they compute spacecraft trajectories.Quotewhy do we call zero G force ?If we are scientists we don't. We more commonly refer to the conditions experienced in Earth orbit as microgravity. Bodies in free fall are effectively weightless and this is what is meant by zero-G. I think you can see that it is a misleading term.QuoteAnd you should not use math at 100% in physics like ( 1/0 is infinity no radius and no mass can u tell me a mass with Zero radius ?). You seem to have misunderstood Bored Chemist's post. He suggested that the only way you can make the force reach zero is by setting R to infinity, not to zero. Which part of this were you having difficulty with?

If you're trying to understand something it's generally not a good idea to insult the people trying to explain it to you. BC was not posting answers like a kid. We have answered your questions, perhaps you should re-read our posts more carefully.Quoteok what will happen if it doesn't have same velocity as earth ??If what doesn't? The space shuttle? Like I already said, QuoteIf you stop the ball it will be pulled inwards by the elastic, the same would happen to the Earth or the space shuttle if you somehow removed its velocity relative to the sun.Quotewhy do we call zero G force ? what about suns G force ?Bored Chemist already explained in his post; QuoteThe talk of zero g refers to an objetc in free fall- since it's already following gravity, gravity doesn't have an aparent effect. Of course since gravity has an infinite range there is always a gravitational field everywhere. But if you are far enough away from things the effect is small.

The force of gavity exerted on an object near earth is not zero, but it's small.The eath's radius is about 6,000 Km and it's distance from the sun is about 150,000,000The earth's mass is about 6 E 24 Kg and the suns is about 3 E 30So mass is 0.5E6 times greater but the radius is 25000 times bigger so the gravitational pull from the sun is about 1200 times less than the pull of gravity at the earth's surface.

Just because you don't like the idea of gravity having an infinite range doesn't mean it's not true.What else could happen? What would stop it at some finite range?Also, if English isn't your first language then perhaps you should avoid "text speak".

I don't get it..!! How can G Force range is Infinity ? it is well known fact that it's limited range.

F= G M1 M2 /R^2

Quote from: ScientificBoysClub on 28/05/2009 16:04:08I don't get it..!! How can G Force range is Infinity ? it is well known fact that it's limited range.It's not a well known fact, as it's not well known and it's not a fact. Did you notice that Bored Chemist gave the equation earlier?Quote from: Bored chemist on 26/05/2009 17:18:17F= G M1 M2 /R^2This means that there's an inverse square relationship, and unless you are an infinite distance apart, the attraction will always be greater than 0.That is a well known fact.

about Quote from: BenV on 28/05/2009 16:30:14Quote from: ScientificBoysClub on 28/05/2009 16:04:08I don't get it..!! How can G Force range is Infinity ? it is well known fact that it's limited range.It's not a well known fact, as it's not well known and it's not a fact. Did you notice that Bored Chemist gave the equation earlier?Quote from: Bored chemist on 26/05/2009 17:18:17F= G M1 M2 /R^2This means that there's an inverse square relationship, and unless you are an infinite distance apart, the attraction will always be greater than 0.That is a well known fact.BenVI admit it that I was wrong about limited range but i was telling you in terms of General theory of relativity .... it is limited .. am i wrong ?Why on earth all answers r being posted in terms of Newtons Universal law of G ?

What about it? Specifically, what is your question?