Gravitational force

[magisuns]

obligatory page*

[Crowley]

As another example from someone who only kinda thinks they have the right idea.

Put a ball on a couch, sit on the couch near the ball. The bending of the couch from your mass causes the ball to roll towards you.

Genius.

[Buddhist]

I think the answer is: 2012.

Btw that sci-five win!

[EvGa]

3D model, but remember there are more than 3 dimensions, I believe 4 in Einstein's relativity. Not sure.

[klokus]

i think it is because one of the 4 elemental forces between atoms and atom-particels is based on mass...

the reason why it reaches so far is because the masses create fields, like a magnetic field created by electricity. the field is just very big.

[dom]

I still don't understand. How could the ball moves to the area with higher height

Don't be too hard on yourself. Concepts like these take a certain level of thinking. Some people just aren't there yet.

[Apollion]

mass=gravitaional pull

thats my 2 cents

[NuclearSilo]

i think it is because one of the 4 elemental forces between atoms and atom-particels is based on mass...

the reason why it reaches so far is because the masses create fields, like a magnetic field created by electricity. the field is just very big.

And what's the nature of a field? some kind of matter that float around?

[EvGa]

And what's the nature of a field? some kind of matter that float around?

We don't know what the force of gravity is "made of".

[/Pi]

Start @ ~6:00 (although, the whole vid is interesting on its own)

Code: Select all

[poehalcho]

[quote="NuclearSilo"]Ok bend space. For example this:

How does that make 2 objects pull each other?

well...if an object is to breach the territory that is bent, it would be forced to slide towards it right? what can go down goes down. (in this case it's the ball itself being pulled inside). if the ball would have enough speed it would also be possible to pass straight through the bent space and continue.
In spaceflight they use this to create a swinging motion around a big planet so that we can launch our rockets to go even faster without using a lot of fuel.

[NuclearSilo]

Ok bend space. For example this:

How does that make 2 objects pull each other?

well...if an object is to breach the territory that is bent, it would be forced to slide towards it right? what can go down goes down. (in this case it's the ball itself being pulled inside). if the ball would have enough speed it would also be possible to pass straight through the bent space and continue.
In spaceflight they use this to create a swinging motion around a big planet so that we can launch our rockets to go even faster without using a lot of fuel.

Normally, on Earth it works like that, you sit on a couch and any balls around on the couch will be drawn to you. It happens because there is a 3rd party force involved, the gravity of the Earth and a force by the surface, not because the couch is bend nor the human body attract it. In space, it's not the same, what is the other 2 forces?

[poehalcho]

Ok bend space. For example this:

How does that make 2 objects pull each other?

well...if an object is to breach the territory that is bent, it would be forced to slide towards it right? what can go down goes down. (in this case it's the ball itself being pulled inside). if the ball would have enough speed it would also be possible to pass straight through the bent space and continue.
In spaceflight they use this to create a swinging motion around a big planet so that we can launch our rockets to go even faster without using a lot of fuel.

Normally, on Earth it works like that, you sit on a couch and any balls around on the couch will be drawn to you. It happens because there is a 3rd party force involved, the gravity of the Earth and a force by the surface, not because the couch is bend nor the human body attract it. In space, it's not the same, what is the other 2 forces?

watch the video posted above. You shouldn't take the ball on a couch thing too literal. technically both you and the ball are both drawn towards each other, however on human size the power of gravity is so incredibly tiny it doesn't even matter. it's all about the mass of an object. you can have a tiny object, but as long as it has a great mass it'll have great gravity as well. unfortunately the only small things known to us with truly great mass are black holes. their gravity is powerful even light can't escape from them. that's why black holes are the most pure black that there is.
anyway, to put it simple: you and the ball do pull each other, but sizes are so small it doesn't matter at all. planets are really big...they are also heavy, planets pull each other, planets pull us. that's why we don't fall off earth, and why the moon is still circling us and why we are still circling the sun.

for further information you should probably dwell into escape velocity.

[*BlackFox]

This is pretty interesting stuff.

The terms gravity and gravitation are often used to explain the same thing, but there is a definite difference between the two.

Gravitation is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together.

Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.


Gravitation is actually a very weak force. The pull is too weak to be felt between two people and it is not even strong enough to pull together two lumps of lead placed right next to each other. It is only when one of the masses is the size of a planet that we can feel the force of gravity.

[NuclearSilo]

In the video they can easily explain it because they considered the space as a flat 2D surface. How can they sure that by considering one dimension less, they wouldn't modify anything important? And why no one till now has made a fully 3D explanation?
Beside, in any video, people only show the gravity of one object. They forgot to show the gravity of other object and they forgot that gravity could add up and bend the space into a complete abnormal shape

[Jaapii]

you must have read this

http://www.thefinaltheory.com/scienceflaws.html

[poehalcho]

In the video they can easily explain it because they considered the space as a flat 2D surface. How can they sure that by considering one dimension less, they wouldn't modify anything important? And why no one till now has made a fully 3D explanation?
Beside, in any video, people only show the gravity of one object. They forgot to show the gravity of other object and they forgot that gravity could add up and bend the space into a complete abnormal shape

It's a documentary. it's meant to clear things up for the average person. naturally they've dumbed it down a little so that everyone can understand. this is the closest possible (current) truth that can be explained to anyone. if you want to know all the details you should ask your physics teacher, not a forum.

either way, no1 can be completely sure of this stuff for now because it's in a currently 'hard to reach' part of the universe.

[EvGa]

In the video they can easily explain it because they considered the space as a flat 2D surface. How can they sure that by considering one dimension less, they wouldn't modify anything important? And why no one till now has made a fully 3D explanation?
Beside, in any video, people only show the gravity of one object. They forgot to show the gravity of other object and they forgot that gravity could add up and bend the space into a complete abnormal shape

You're not even reading my replies huh? Because space has more than 3 dimensions and it would be EXTREMELY hard to model and visualize if they represented it in all the dimensions...they probably can't. Like I said in another reply, these models DO leave out or modify certain factors to help you understand, they are not perfect.

You'll have to master mathematics and general relativity to fully understand.

From the site jaapi linked:

Q: But don't we know all about the gravity of Black
Holes and how even light can't escape?

A: No. This often-repeated error is based on a clear oversight.
Black Holes are said to form when a star expends its nuclear
energy and physically collapses. But starlight only shines from
intact, functioning stars, of course. There is no more reason to
expect light to shine from Black Holes than from a burnt-out,
smashed light bulb. This is a commonly repeated error in
plain view that is intended to showcase and dramatize our
scientists' deep understanding of Black Holes and gravity, but
which actually exposes how little is truly understood about
either.

Stopped reading after that. :facepalm:

Ok, read a little more...that site is borderline retarded.

[NuclearSilo]

In your model, you talk about the dimension of time. Why time has anything to do with the gravity? Time is not a thing, it's just a concept

As far as I know, it's either force creates force, or force modifies shape, never heard about shape could generate/create a force from nowhere.

[poehalcho]

In your model, you talk about the dimension of time. Why time has anything to do with the gravity? Time is not a thing, it's just a concept

As far as I know, it's either force creates force, or force modifies shape, never heard about shape could generate/create a force from nowhere.

that's exactly what we're trying to teach you here
READ

[klokus]

i think it is because one of the 4 elemental forces between atoms and atom-particels is based on mass...

the reason why it reaches so far is because the masses create fields, like a magnetic field created by electricity. the field is just very big.

And what's the nature of a field? some kind of matter that float around?

a field does not exist of a specific matter, it's a word to define the force around objects/items/atoms/...

it stands for the force that it "sends out". now you're question is probably, "what does it send out?" (although that's the same question as above)... nothing, lol.

(actually, the general relativitytheory says that it sends out transversal waves)

[EvGa]

In your model, you talk about the dimension of time. Why time has anything to do with the gravity? Time is not a thing, it's just a concept

As far as I know, it's either force creates force, or force modifies shape, never heard about shape could generate/create a force from nowhere.

Because time and space are intertwined. Hence, spacetime. A clock on top of Mount. St. Helens ticks slower than a clock at sea level. A person traveling at the light of speed would age more slowly, they would be younger than a person stationary on the Earth. It's all relative. Relativity.

Spacetime, gravity, forces, it's all extremely abstract. Space itself (widely accepted) is comprised of 11 dimensions.. so um..trying to explain things with a 2D or 3D model is..well..lacking.

QM shows that matter can be created from 'nowhere', even in the vacuum of space shit is popping into and out of existence.

The three other forces (strong/weak nuclear and electromagnetic) are made of 'parts', unlike gravity (we haven't figured it out yet). Gluons for strong nuclear force. Vector bosons, W and Z bosons for weak nuclear force. Photons for the electromagnetic force. Those are the 'carrier' subatomic particles for the 3 forces other than gravity. For gravity...we dunno lol.

It's theorized the Higgs bosons and their corresponding higgs field is what gives objects mass..from there maybe we'll discover the carrier particle for gravity?

*the above information may not be 100% correct.

[SM-Count]

In the middle ages certain levels of stupidity were attributed to insanity and those people would be jailed, while I don't have the power to do that here, I can lock this thread because the amount of misinformation/simplification is a threat to the future of mankind.

If you want good usable information, go to a physics forum, many exist. If you want to continue trolling/feeding the troll, well, I'm stopping that here.