The Moon, Gravity? or Fixation?

[flracing]

I put this on a science forum, thought i would post it here too.

If im on on earth, im stuck down by gravity.
If I fly in a rocket, eventually I leave the pull of the earths gravity and float around inside the rocket, correct?

So theres no gravity in space! So how does the moon go around the earth? Can't be gravity there is none between the earth and the moon, it must be something else, which I have called "Fixation", a drag force cus the moon is going round the earth while the earth goes round the sun.

[Daniel]

There is gravity between the moon and earth ffs.

[Dave B]

Wow, so many fundamental errors in such a short post. And you're still convinced you've discovered a new way of driving racing cars and pumping oil?

[flracing]

There is gravity between the moon and earth ffs.

I though space men float not fall... watch some space films, there floating, everything is.

Im only going what were told... im not out there...

[Daniel]

:facepalm:

[flracing]

:facepalm:

dan, you just can't give me an answer, as your not out there either.

[Daniel]

I'm not you science teacher.... It's not my fault that you either have no understanding of physics or are a massive troll.

[flracing]

I'm not you science teacher.... It's not my fault that you either have no understanding of physics or are a massive troll.

Doesnt change the fact that things float in space.

[Dave B]

... im not out there...
Are you totally sure about that? :dozey:

[Daniel]

Doesnt change the fact that things float in space.
http://www.physicsforums.com/showthread.php?t=77903

Next thread where you proclaim to know everything when you clearly know nothing please?

[Thomer]

There is no gravity. The Earth sucks.

:)

[Rollo]

Can't be gravity

Can be gravity. IS Gravity.

Gravity, is one of the four fundamental interactions of nature and every object which has mass, has it's own gravitational field, including z-particles.

Is Gravity. Story. End of.

[Daniel]

Can be gravity. IS Gravity.

Gravity, is one of the four fundamental interactions of nature and every object which has mass, has it's own gravitational field, including z-particles.

Is Gravity. Story. End of.
Link? :p

[flracing]

Are you totally sure about that? :dozey:

This is out there...

How big is the universe?

Imagine traveling in to deep space, go forward a large distance theres nothing stopping you travelling forward forever, that's infinite space.
If there is an end lets call it a wall. What is the walls thickness? What's on the other side? More space!
Again go forward a large distance, theres nothing stopping you travelling forward forever, again if there is an end, lets call it a wall. What's on the other side? Again more space!
This Space/Wall/Space relationship could possibly go on forever, question is, what is last? Space or Wall?

Wall's has sides so space always surrounds them. So we live in an infinite space universe.

So we are infinitely small compared to the space around us. Were a MicroDot!!

Are well falling through space? at what speed? due to inertia we could be falling infinitely at an infinite speed.

That is out there, all this crap is my own thinking. Can anyone beat this?

[flracing]

After I worked out the perfect driving line, im very bored now, as you can read.

[Daniel]

After I worked out the perfect driving line, im very bored now, as you can read.
Have you ever actually driven a car on the road?

[flracing]

Have you ever actually driven a car on the road?

Yes mate, from a escort, to a orion, to a vulcan to a xr2i to a stupid vectra.

The vulcan was fun, put your foot down and the car bounced accelerating, and i mean BOUNCED!!

The xr2i was my mothers, I learnt the perfect driving line in that crazy little car!

[flracing]

Too be honist, the perfect driving line does not exist, theres many! you can take any line you like. At any speed, but you do need accuracy else you head right in the wrong direction lol

So far im 100% accurate. Though it was only for 10 minutes, i have not done it since as it's not something I would like to be seen doing at 25, a bit too much fame for that age. That was 10 years ago. Im sorting out my photo licence so can go on a local race track in a few weeks time. Castle coombe.

[Daniel]

Wow. You're like an older British version of wade.....

[ShiftingGears]

Doesnt change the fact that things float in space.

Because when things are orbiting around earth, the earth falls away from them at the same rate they fall towards the earth. Hence, they are floating.

[Rollo]

Are well falling through space? at what speed? due to inertia we could be falling infinitely at an infinite speed.


We are falling into the sun at 0.0058987 m/s²

Acceleration=G*m1/r(2)

Newton worked that out in 1687. Please find a high school textbook.

[Tazio]

Are well falling through space? at what speed? due to inertia we could be falling infinitely at an infinite speed.
Thou shall not travel faster than the speed of light! That is an accepted law of physics.
I'm not trying to flame you. You can rest assured that the movements of celestials follow (fairly) well understood laws. We are moving quite rapidly just taking into consideration the rotation of the earth. We are traveling speedily around the Sun. The solar system is rotating (relatively) rapidly in a tendril arm of the Milky Way Galaxy, approximately once every 250.000.000 years)around it’s center, which is also hauling ass as the Universe expands. And just too really throw you a curve ball that speed is accelerating. But the law of gravity (as the formula Rollo posted. lets not get into Einstein yet) keeps a measurable balance to the universe. If you want to watch something that gives a great layman’s definition I highly recommend:
Cosmos:
Episodes 8 and 10
You can watch it here:

http://www.hulu.com/watch/63323/cosmos-travels-in-space-and-time

[Mark]

Spacecraft in orbit are still subject to gravity. The astronauts are weightless because they are falling to earth at the same rate they are travelling around. Anything falling is subject to the same thing, hence astronauts training in aircraft.

If a spacecraft were to stop orbiting and stand still it would fall to earth just like anything else. The same applies to the moon and the earth and the earth and the sun.

[Ranger]

Because when things are orbiting around earth, the earth falls away from them at the same rate they fall towards the earth. Hence, they are floating.


Spacecraft in orbit are still subject to gravity. The astronauts are weightless because they are falling to earth at the same rate they are travelling around. Anything falling is subject to the same thing, hence astronauts training in aircraft.

If a spacecraft were to stop orbiting and stand still it would fall to earth just like anything else. The same applies to the moon and the earth and the earth and the sun.

Best explanations. Threadstarter, please read these. :)

[MrJan]

Too be honist, the perfect driving line does not exist, theres many! you can take any line you like. At any speed, but you do need accuracy else you head right in the wrong direction lol

So far im 100% accurate. Though it was only for 10 minutes, i have not done it since as it's not something I would like to be seen doing at 25, a bit too much fame for that age. That was 10 years ago. Im sorting out my photo licence so can go on a local race track in a few weeks time. Castle coombe.

What are you doing at Combe? I've done a couple of sprints there and it's a scary place. The first time you go up over Avon Rise is very strange, especially as I've spent years watching there and have seen countless accidents. The second chicane is good though (the one after Tower), the camber of the corner means that you can go in much, much faster than you think and the car will stick.

If you've got an MSA license then have a look at a few of the sprints in the ASWMC championship, it's pretty cheap motorsport and somewhere like St Eval is a great place to throw the car around. There's a bloke who was at the last event I did (Mamhead hillclimb) who had a Kia Pride that cost £500 and another chap in a Lup TDi so it doesn't really matter what car you have.

[flracing]

What are you doing at Combe? I've done a couple of sprints there and it's a scary place. The first time you go up over Avon Rise is very strange, especially as I've spent years watching there and have seen countless accidents. The second chicane is good though (the one after Tower), the camber of the corner means that you can go in much, much faster than you think and the car will stick.

If you've got an MSA license then have a look at a few of the sprints in the ASWMC championship, it's pretty cheap motorsport and somewhere like St Eval is a great place to throw the car around. There's a bloke who was at the last event I did (Mamhead hillclimb) who had a Kia Pride that cost £500 and another chap in a Lup TDi so it doesn't really matter what car you have.

Thanks for the info, im going to coombe as it is close to where I live, though to be honist the track does not look that interesting compared to others, but it's somewhere to try my FLRacing idea.

[Kneeslider]

Approaching your original question in another way...

Are you familiar with the zero g parabolic flights which can be undertaken in aeroplanes?

You can simulate zero g conditions for about 25 seconds by pushing the control column of the aircraft forwards so the flightpath looks as though the aircraft is going over a hump back bridge. The ammount of time the zero g effect lasts for is dependant on the height of the parabola described.

Would you say that there can't be any gravity anymore around and inside the aeroplane?

[Andrewmcm]

Wow someone really must have been playing truant during science lessons.

[Mark]

So astronauts in orbit around the earth are really falling towards it but away from it at the same time. However there is a point around the earth where the rate of orbit is the same as the rotation of the earth, hence any object will remain above the same point in the earth, called a geostationary orbit. Which is what communications satellites use. But interestingly, not most spy satellites or GPS.

[Firstgear]

:
Wow. You're like an older British version of wade.....
:p :p :p

[donKey jote]

Maybe Mark should check Wade and Flracing´s IPs :laugh:

[Bob Riebe]

Hmm, does this mean that satellites that fall, due to decaying orbits, really fall because they go through a astro-mystery sight, you know, like the one in the Black Hills where balls roll up hill? http://www.motorsportforums.com/forums/images/smilies/roll_eyes.gif

[donKey jote]

No, that´s all Obama´s fault :p

[Tazio]

Actually the main causes of terminal decaying low earth orbits are sun spots that distort the atmosphere of the earth, and of course collisions!
Obama's contribution is a given! :laugh:

[Zico]

This is out there...

How big is the universe?

Imagine traveling in to deep space, go forward a large distance theres nothing stopping you travelling forward forever, that's infinite space.
If there is an end lets call it a wall. What is the walls thickness? What's on the other side? More space!
Again go forward a large distance, theres nothing stopping you travelling forward forever, again if there is an end, lets call it a wall. What's on the other side? Again more space!
This Space/Wall/Space relationship could possibly go on forever, question is, what is last? Space or Wall?

Wall's has sides so space always surrounds them. So we live in an infinite space universe.

So we are infinitely small compared to the space around us. Were a MicroDot!!

Are well falling through space? at what speed? due to inertia we could be falling infinitely at an infinite speed.

That is out there, all this crap is my own thinking. Can anyone beat this?

You come across as quite an abstract thinker, I have a few questions for you.

Maybe you can tell me how gravity works, what it is and why?

Do you think that gravity may have been weaker billions of years ago allowing the huge dinosaurs to exist... or maybe the earth simply spun faster in those days, with the centrifugal force reducing the effect of gravity?

Is there a place where time doesn't exist?.. is it possible? What would life be like in a place like that?

If you have studied the concept of time travel you will have heard of the experiment they did where they sent an atomic clock on a journey round the earth on a plane and it lost some time, proving in their eyes that time travel was real Do you thnk they took into account that the widely recognised accuracy of an atomic clock just might have altered at atomic level due to the reduced gravity of that altitude?

Does God exist or are we all just the product of some big bang?

If the big bang.. what/who made the big bang and all the stuff that came out of it.. mud/rocks, gas and stuff. You cant get something out of nothing.. or can you?

Time travel theory- Do you think that by bending the fabric of space/time that we could one day travel through time? (gravity bends light) Do you think they have accounted for the fact that although something may appear closer to something due to light rays being bent it doesn't change the effect that its actually just an illusion when something appears to be in a place that it isn't?

[Rollo]

Maybe you can tell me how gravity works, what it is and why?

No.

We can describe gravity as a simple equation, thusly:

Force of Gravity:
Fg = G x M1 x M2 / R²

G is universal gravitational constant: 6.67 x 10^-11
M1 & M2 are the two masses that attract each other
Fg is the attractive force due to gravity
R is the distance between the two masses

However - buggered if we actually know why masses attract each other, or what it is exactly. If you however can find an explanation for it, then the people who give out Nobel Prizes might want to talk to you.

[schmenke]

No.

We can describe gravity as a simple equation, thusly:

Force of Gravity:
Fg = G x M1 x M2 / R²

G is universal gravitational constant: 6.67 x 10^-11
M1 & M2 are the two masses that attract each other
Fg is the attractive force due to gravity
R is the distance between the two masses

However - buggered if we actually know why masses attract each other, or what it is exactly. If you however can find an explanation for it, then the people who give out Nobel Prizes might want to talk to you.

Gravity is the inevitable, naturally-occurring attraction between my sister-in-law and the Twinkie in the cupboard.

[Tazio]

If you however can find an explanation for it, then the people who give out Nobel Prizes might want to talk to you.

Einstein did receive the Nobel prize for his theory of General Relativity showing what Newtonian physics did not in relation to gravity. (However it is a theory and not provable) ;)

AAqSCuHA0j8&feature=PlayList&p=A337FA55B67FCFE6&playnext_
from=PL&playnext=1&index=42

However data gathered by the Fermi Gama Ray Telescope Project
shows that his ideas about light don't hold true for all wavelengths,
which leaves Quantum Mechanics and Relativity unified!

nByekIx7XXw&feature=related

[Rollo]

Einstein did receive the Nobel prize for his theory of General Relativity showing what Newtonian physics did not in relation to gravity

Einstein found a better description of how it works, but not exactly why. Gravity is one of the properties of spacetime, however we don't know why mass in particular creates(?) gravity and we don't really have a good handle on time itself.
Time is even more elusive, most of us only experience it in one direction. Why is that?

[Tazio]

Einstein found a better description of how it works, but not exactly why. Gravity is one of the properties of spacetime, however we don't know why mass in particular creates(?) gravity and we don't really have a good handle on time itself.
Time is even more elusive, most of us only experience it in one direction. Why is that?I did state it is a theory ;)
As for your second question I'm not sure what you mean about experiencing time in one direction. Obviously in day to day life you experience time as it moves forward. But when you look at a star what you see is light generated many years ago, albeit going forward, but backward in time!

BTW I meant non-unified in post#38

[Mark in Oshawa]

I dunno..but I think the moon hasn't hit the Earth because Chuck Norris is using some Jedi Mind trick on it or something to keep it away...

[Kneeslider]

I think that I found more pearls of wisdom here, they sound as though they have been produced by the same guy!

http://www.bikechatforums.com/viewtopic.php?t=197779

Most of the way down the first page is this little nugget... Priceless!!

My name is Shervin Rezaiy. I am studing mechanical engineering. My goal is to make a car (or any kind of vichle) which works with gravity. i plan to find a way to change the gravity energy to mechanical energy and make an auto mobil by it and start manufactring it so all people in the world can enjoy it. If i do that i will be happy of my life. This is my goal since i was 15 years old. I came out of my country to countinue my education in higher level. I got my MA in "Absloute Mathemathics" from my country but for religon/political reason the goverment of my country does not allow me to study in university. however i got some other diplomas in computer,typing, automechanic, Karate,etc.... I can open a mechanic shop legally right now because i have the certification for it. I was in an "auto mechanic" training class which was very helpful. I got the highest grade in the whole city (congradulation!!) My father has a dealership who sells truck engines and i was learning/helping him since i was 7 just by the time that he purchased his first engines to start his businiess. I lived in Europe for a while. Beautiful place. I miss every thing from Europe. Majority People were polite and civilized. full of history and science. Regardless of your gender,age,race,location,etc... if you are polite, oriented, and civilized I would like to hear from you if you do something positive. Also if you have any questions about anything in the world ask me I will try to answer you. I am looking for peace,love,friendship,and discovering this wonderful life and the world around us and inside us and above us; There is sooo much to discover. You can see some more pictures of my work on http://www.flickr.com/ShervinRRR Happy New Year!

[Tazio]

Kneeslider that looks like a pretty interesting forum (I think I will keep my Aprilia 750 stock thank you)
Did you read this guys Flicker profile? I must say it is quite odd, perplexing, exaggerated,
and curious to say the least. Obviously English is not his first language
Here is the beginning of his profile/bio from
http://www.flickr.com/people/shervinrrr/


About ShervinRRR / Shervin ReZaiY

I am hot. I am sexy. I am cool. I am sweet. I am funny. I am serious. I am unbelivable. I am impossible some times. i am down to earth. i am generous sometimes. I am nauthy and i have high high high feelings,expectataions and unlimited mind.
I had 17 fatal accidents :confused: and involved in more than 1000 small collision :eek: I had more than 100 traffic tickets in my life.
I escaped from police 18 times mirror to mirror and i did it just to challenge my driving skills
That's an impressive driving record!!! :s mokin:
As for the rest:
:rotflmao: :rotflmao:

[Mark]

My goal is to make a car (or any kind of vichle) which works with gravity

Too late, my car does this already!

[MrJan]

That bloke has thousands of photos of his Ninja, he's definitely a weird cookie.

[Andrewmcm]

I did state it is a theory ;)
.......Obviously in day to day life you experience time as it moves forward. But when you look at a star what you see is light generated many years ago, albeit going forward, but backward in time!



Light travels at a finite speed, you are only looking 'back' in time as it takes so long for the light to reach our eyes from the star emitting the light. If you saw the star as it is now (in your definition of 'now') you'd be breaking causality laws as the light would have had to travel infinitely fast to reach you.

[Tazio]

Light travels at a finite speed, you are only looking 'back' in time as it takes so long for the light to reach our eyes from the star emitting the light. If you saw the star as it is now (in your definition of 'now') you'd be breaking causality laws as the light would have had to travel infinitely fast to reach you.

That is not what I said at all!
I said you would view the star as it was when it first projected its light! :rolleyes: :dozey:
Then suggested that light moving forward could be construed as experiencing time as a linear forward moving experience in reply to a rather ambiguous, yet interesting question from Rollo!

[Tazio]

That is not what I said at all!
I said you would view the star as it was when it first projected its light! :rolleyes: :dozey:
Then suggested that light moving forward could be construed as experiencing time as a linear forward moving experience in reply to a rather ambiguous, yet interesting question from Rollo!
Let me rephrase part of this!
I implied you would view the star as it was at the time it projected the light that is traveling 186,000 m/per/sec. and precisely as far back in time that it would take determined by its distance from the earth!

[Mark]

There's no time travel involved there. Light travelling from a star to your eyes is no different than a train travelling from London to Edinburgh that doesn't change on the way..

What *is* hard to get your head around is the whole the speed of light is relative to the observer thing.

[Tazio]

There's no time travel involved there. Light travelling from a star to your eyes is no different than a train travelling from London to Edinburgh that doesn't change on the way..

What *is* hard to get your head around is the whole the speed of light is relative to the observer thing.Especially in the realm of “Time Dilation". (at least for me)

[Mark]

Especially in the realm of “Time Dilation". (at least for me)

Indeed. Especially when you consider that since light is travelling at, well, light speed. Then it's not subject to time at all?

[Tazio]

Indeed. Especially when you consider that since light is travelling at, well, light speed. Then it's not subject to time at all?

It is mind numbing!
According to Carl Sagan A human traveling very near the speed of light could circumnavigate the known Universe, age only a few years.
and when he returned to earth it would be so far in its future that the sun would be long dead, and the planets in our solar system scattered! :confused:

[Mark]

Well he'd still be subject to normal ageing and so wouldn't be able to get far due to the speed of light being quite slow compared to the size of the universe.

[Tazio]

Well he'd still be subject to normal ageing and so wouldn't be able to get far due to the speed of light being quite slow compared to the size of the universe.Not according to Sagan!

http://www.videosurf.com/video/time-dilation-explained-146803544

[Andrewmcm]

No, Sagan and Mark are in agreement. It's all about the frame of reference.

The kid (let's call him Dave) that goes of travelling at near light speed ages at a normal rate in his frame of reference. His brother (Bob), who is left on Earth, observes Dave on the bike travelling at near-light speed and notices that time is passing slower for Dave than it is for him. If Dave made it to Andromeda (our nearest galactic neighbour) and back at 99.9999% of the speed of light, he'd do the trip in 60-ish years in his frame of reference. Bob however, would have to live to be around 5 million years old to see his brother again, as that is how long it would take (in Bob's frame of reference) for Dave to complete his journey.

Simple eh!

[donKey jote]

simple, yes, but still only mind games unless Dave is a sub-atomic particle and Bob's his uncle :p

[Andrewmcm]

It is mind numbing!
According to Carl Sagan A human traveling very near the speed of light could circumnavigate the known Universe, age only a few years.
and when he returned to earth it would be so far in its future that the sun would be long dead, and the planets in our solar system scattered! :confused:

Incidentally a human would never make it around the known Universe as it is expanding at such a rate that it is physically impossible to complete the journey.

As for the time dilation thing, Brian Cox explains it well here - http://www.youtube.com/watch?v=e8c1Dy-Cx4s - watch the last two minutes of this and the first bit of Part 5.

[Mark]

No, Sagan and Mark are in agreement. It's all about the frame of reference.

The kid (let's call him Dave) that goes of travelling at near light speed ages at a normal rate in his frame of reference. His brother (Bob), who is left on Earth, observes Dave on the bike travelling at near-light speed and notices that time is passing slower for Dave than it is for him. If Dave made it to Andromeda (our nearest galactic neighbour) and back at 99.9999% of the speed of light, he'd do the trip in 60-ish years in his frame of reference. Bob however, would have to live to be around 5 million years old to see his brother again, as that is how long it would take (in Bob's frame of reference) for Dave to complete his journey.

Simple eh!

So in effect if you could build a light speed craft, then it's possible to travel vast distances within a human lifetime, and crossing the galaxy would presumably be no problem at all? Other than the fact the human race would have died out before you manage it?!