Push from Gravity?
Kumar
In common logic, basic purpose of gravity should be to keep things
grounded. But if things go underground? I don't know what is the
ground & underground for this purpose. In this thought & in
consideration of similar poles repel(same poles of magnet are repelled
due to earth gravity), can there also be a PUSH due to gravity?
Sam Wormley
> Hello,
>
> In common logic, basic purpose of gravity should be to keep things
> grounded.
Nature is the way she is. You are trying to assign purpose!
Yousuf Khan
Gravity isn't what keeps us grounded, alone. The whole reason we have a
ground at all is because of the electromagnetic force, which keeps us
from going any further down. If all we had was gravity, then we'd just
touch the ground, and keep going down, never being stopped from going
any further. It's the electromagnetic resistance between atoms that stop
us from going through the ground.
Yousuf Khan
Kumar
Pls enhance it.
Kumar
Thanks. It is new to me. Can we consider electromagnetic force being
in wave form, works alike wave with ups & down and gravity being a
center line in a wave.
Yousuf Khan
> Thanks. It is new to me. Can we consider electromagnetic force being
> in wave form, works alike wave with ups & down and gravity being a
> center line in a wave.
I'm not sure what you're getting at here. If you're talking about the
wave-like nature of forces, then it applies equally to gravity as it
does to EM. Gravity travels in waves too, according to theory.
But I think you're referring to the relative importance of each force to
our lives. In other words, you're trying to get me to say that gravity
is the major force in our lives, while EM just makes some minor
adjustments to that, right?
The answer to that is no, the major force in our lives is the EM, not
gravity. Gravity affects us in only one way, and that is the force of
gravity of Earth on our bodies. Yet a little fridge magnet can lift a
coin off the ground overcoming all the force of gravity of the Earth on
that coin. Or a junkyard magnet can lift a whole car off the ground,
overcoming all of the gravity of Earth on that car. If you're in Earth
orbit, you don't feel the effects of gravity on your body anymore, but
you certainly keep feeling the effects of EM. Just the fact that your
body stays together is a feature of EM, whether in space or on Earth.
Other things that EM is responsible for that you wouldn't have
considered is numerous. The aerodynamics of a jumbojet that keeps it
aloft against the Earth's gravity is a feature of EM at its most basic
level too. When water turns to steam or ice, is because of EM. Even the
light that your eyes see with is created by the EM force too. In fact,
the other name for light is "electromagnetic radiation".
Yousuf Khan
Kumar
Allthough this reply is quite informative to me but here i am trying
to understad whether gravity also has push/repulsion apart from
attractive/pull force?
Whether gravity can influence EM force?
Y.Porat
------------------
if you dont know
say i dont know
got it parrot crook ??
all attraction forces are at the end of the day
push forces !!!
Y.Porat
--------------------------------------
Kumar
How?
Some forces can be repelling at the end .:)
eric gisse
You fucking moron. Five hours of drinking and you still sound retarded,
gooood christ.
BURT
Forces push.
Cwatters
"Kumar" <lordsh...@gmail.com> wrote in message
news:0d2159db-e266-4fe3...@13g2000prl.googlegroups.com...
> can there also be a PUSH due to gravity?
Not that we know of.
However there is evidence the universe expanding and the rate of expansion
is accelerating. So something is pushing the universe apart. We have given
this the name Dark Energy but we don't know what it is...
http://en.wikipedia.org/wiki/Dark_energy
Kumar
<colin.wattersNOS...@TurnersOakNOSPAM.plus.com> wrote:
> "Kumar" <lordshiva5...@gmail.com> wrote in message
Thanks.
How can we relate gravity with magnet move towards S & N pole?
Sam Wormley
The way nature behave's has nothing to do with "purpose". Purpose
is a construct humans.
Sam Wormley
>
> Allthough this reply is quite informative to me but here i am trying
> to understad whether gravity also has push/repulsion apart from
> attractive/pull force?
>
Before answering whether graity can be repulsive, please note:
Ref: Hartle, "Gravity: An Introduction to Einstein's General Relativity",
Addison Wesley (2003)
"A few properties of the gravitational interaction that help explain when
gravity is important can already be seen from the gravitational force law
F_grav = G m_1 m_2 / r_12^2
o Gravity is a universal interaction in Newtonian theory between all mass, and,
since E = mc^2, in relativistic gravity between all forms of energy.
o Gravity is unscreened. There are no negative gravitational charges to cancel
positive ones, and therefore it is not possible to shield (screen) the
gravitational interaction. Gravity is always attractive.
o Gravity is a long-range interaction. The Newtonian force law is a 1/r^2
interaction. There is no length scale that sets a range for gravitational
interactions as there is for the strong and weak interactions.
o Gravity is the weakest of the four fundamental interactions acting between
individual elementary particles at accessible energy scales. The ratio of
the gravitational attraction to the electromagnetic repulsion between two
protons separated by a distance r is
F_grav G m_p^2 / r^2 G m_p^2
-------- = -------------------- = ------------- ~ 10^-36
F_elec e^2 / (4 pi e_0 r^2) (e^2/4pi e_0)
where m_p is the mass of the proton and e is its charge.
These four facts explain a great deal about the role gravity plays in physical
phenomena. They explain, for example, why, although it is the weakest force,
gravity governs the organization of the universe on the largest distance
scales of astrophysics and cosmology. These distance scales are far beyond
the subatomic ranges of the strong and the weak interactions. Electromagnetic
interactions COULD be long range were there any large-scale objects with net
electric charge. But the universe is electrically neutral, and electromagnetic
forces are so much stronger than gravitational forces that any large-scale net
charge is quickly neutralized. Gravity is left to govern the structure of the
universe on the largest scales.
Sam Wormley
The earth's magnetic filed is generated by a dynamo effect in the
earth's outer liquid core. the phenomenon of magnetism is an
aspect of the electromagnetic force.
Look up:
Maxwell's equations
Electromagnetic Force
Take a freshman course in physics
Google is your friend
Yousuf Khan
> Allthough this reply is quite informative to me but here i am trying
> to understad whether gravity also has push/repulsion apart from
> attractive/pull force?
So far as we know, gravity only pulls.
There is a new type of force recently discovered (only a decade ago)
called Dark Energy that tends to push things in the opposite direction
of gravity. It tends to work on really, really large scales, much bigger
than that of galaxies. This may be the anti-gravity force, however
nobody knows enough about this new force to say for sure that it is
actually related to gravity or not. That's why they call it Dark Energy
instead of Anti-Gravity, just in case they aren't related.
> Whether gravity can influence EM force?
In a sense yes. The force carrier particles of EM are the photons, which
we know as light. If you pass light through a gravity field, it will
bend. You've heard about the case of black holes being able to bend
light so much that they can't escape.
Yousuf Khan
BradGuth
Starting with:
Gravity Force Inside a Spherical Shell (is always zero)
http://hyperphysics.phy-astr.gsu.edu/HBASE/Mechanics/sphshell2.html#wtls
Kumar
Thanks for details. I think, it explains that gravity is just
attractice force not repulsive. It is constant at long distances(eg
gravity is same at ground and at hill). Ok?
Now, is there any relation between gravity & earth's magnetic field?
Kumar
>
> - Show quoted text -
Sorry you already explained it. It tells that there is no relation
between gravity & earth's magnetic field. Ok?
Sam Wormley
Almost-- http://en.wikipedia.org/wiki/Pound–Rebka_experiment
>
> Now, is there any relation between gravity& earth's magnetic field?
Not in any way you are looking for.
Kumar
> Kumar wrote:
> > Allthough this reply is quite informative to me but here i am trying
> > to understad whether gravity also has push/repulsion apart from
> > attractive/pull force?
>
> So far as we know, gravity only pulls.
>
> There is a new type of force recently discovered (only a decade ago)
> called Dark Energy that tends to push things in the opposite direction
> of gravity. It tends to work on really, really large scales, much bigger
> than that of galaxies. This may be the anti-gravity force, however
> nobody knows enough about this new force to say for sure that it is
> actually related to gravity or not. That's why they call it Dark Energy
> instead of Anti-Gravity, just in case they aren't related.
is rotating at a high speed. Does it cause tarnado/whirlpool type
effect on earth surface, which probably can cause both pull & push?
> > Whether gravity can influence EM force?
>
> In a sense yes. The force carrier particles of EM are the photons, which
> we know as light. If you pass light through a gravity field, it will
> bend. You've heard about the case of black holes being able to bend
> light so much that they can't escape.
>
> Yousuf Khan
On other side, how gravity can be influenced by EM force?
Kumar
This look quite interesting.[Probably it may indicate impact on
sitting under a dome/spherical half]. However, how it is related to
push of gravity?
Kumar
>
>
>
> > Now, is there any relation between gravity& earth's magnetic field?
>
>
> - Show quoted text -
Earth is revolving at high & stable speed. Why such revolution not
cause tarnado type effect on earth surface? Gravity just has pull
whereas tarnado can have both pull & push.
Sam Wormley
>
> Earth is revolving at high& stable speed. Why such revolution not
> cause tarnado type effect on earth surface? Gravity just has pull
> whereas tarnado can have both pull& push.
BradGuth
Before you can push, you first have to nullify gravity.
Isn't the greater 2e55 kg surrounding mass of our universe and its
dark matter forming a shell around our passive little 2e30 kg mass?
~ BG
Mahipal7638
> On Dec 13, 6:35 pm, BradGuth <bradg...@gmail.com> wrote:
>
> > On Dec 12, 8:21 pm, Kumar <lordshiva5...@gmail.com> wrote:
>
> > > Hello,
>
> > > In common logic, basic purpose of gravity should be to keep things
> > > grounded. But if things go underground? I don't know what is the
> > > ground & underground for this purpose. In this thought & in
> > > consideration of similar poles repel(same poles of magnet are repelled
> > > due to earth gravity), can there also be a PUSH due to gravity?
>
> > Starting with:
> > Gravity Force Inside a Spherical Shell (is always zero)
> > http://hyperphysics.phy-astr.gsu.edu/HBASE/Mechanics/sphshell2.html#wtls
One should already know this detail of gravity within spherical
spheres before being enlightened of it on Usenet. Usenet is greater
than facebook or twitter -- with or without Google's realtime or real
relevance search technology. Whether the technology be Physicsally
Correct or, yes you guessed it, otherwise.
> This look quite interesting.[Probably it may indicate impact on
> sitting under a dome/spherical half]. However, how it is related to
> push of gravity?
Gravity is an attractive force. Read a damn textbook for mere high
schoolers before you pretend "faking to think."
What, are you an enhanced Sanny, you Kumar you?
All the cheap imitated Physics books sold in India can't help you all
that much?!
STOP giving my fellow Indians a stupidity complex. Even though I'm
well aware of what percentage of a billion humans are likely to be
intellectually challenged in Physics. I ball -- cricket or otherwise
-- parked this unstated percentage.
Gravity is an attractive force per the Physics. Gravity is not pushing
your yogic ass off the under- or above- ground.
Enjo(y)...
--
Mahipal "me always changes"
Just because Tiger Woods carried a fifteenth club in his pants is no
reason to humiliate the man who scores women better than Charlie
Harper does in real life.
Aleph
cd6777...@a21g2000yqc.googlegroups.com>, sent to sci.physics on Sat,
12 Dec 2009 23:55:35 -0800 (PST), Y.Porat <y.y....@gmail.com> imparted
these words of wisdom:
>
> all attraction forces are at the end of the day
> push forces !!!
Lulz whut now?
--
Aleph
This article was posted to USENET, please reply in that manner. Emails
to this account will be ignored.
Kumar
>
> - Show quoted text -
Probably, first we may have to better understand, what it is? Is it
somewhat magnet like pulling force or just a tarnado type pulling
force? Obiously, till earth is revolving, pulling force, if a tarnado
type effect, can continue. Why we don't think that gravity can be a
pulling tarnado type effect?
Kumar
How gravity is only positive/attractive force whereas all other forces
are both sided?
Autymn D. C.
> Hello,
>
> In common logic, basic purpose of gravity should be to keep things
> grounded. But if things go underground? I don't know what is the
> ground & underground for this purpose. In this thought & in
> consideration of similar poles repel(same poles of magnet are repelled
> due to earth gravity), can there also be a PUSH due to gravity?
Of course: a big bang, Hubble flow, Crasnicov tubes, UFOs, so on.
Kumar
Can't it be possible that there is a push from gravity but it is
resisted by some other force esp. EM? Don't only single charge(only
+tive) energy look bit odd?
YKhan
> Thanks. We may need to understand dark energy concept more. As earth
> is rotating at a high speed. Does it cause tarnado/whirlpool type
> effect on earth surface, which probably can cause both pull & push?
No, what you're thinking of is called centrifugal force, which is not
really a force at all, it's the reaction to another force that's
trying to make you go around in a circle. It's a demonstration of
Newton's 1st and 3rd Laws in action. The Laws are:
I. Every object in a state of uniform motion tends to remain in that
state of motion unless an external force is applied to it.
II. The relationship between an object's mass m, its acceleration a,
and the applied force F is F = ma.
III. For every action there is an equal and opposite reaction.
First Law says that if you're moving in a straight line, you're going
to want to keep moving in that straight line at the same speed. So to
move you in in a circle, a sideways force has to be applied on you to
make you curve.
Third Law says there's always a reaction to every action force. So the
reaction to the force trying to make you go in a circle is the
centrifugal reaction. That's what makes you want to pull away from the
circular motion and try to go straight again. The force trying to make
you go in a circle could be that of gravity, or the force of a string
tied around you and spinning you around; it doesn't matter what the
force is, if it's trying to make you go in a circle, the centrifugal
force is the reaction against it.
> On other side, how gravity can be influenced by EM force?
That we don't really know yet. Depends on what gravity actually is.
One school of thought is that gravity is a force administered by a
particle like all of the other forces, like EM or Strong or Weak; it's
particle is called the graviton. We haven't really discovered the
graviton yet, or what its properties are. So until we discover this
particle, we won't be able to tell if and how it interacts with
photons.
The other school of thought is that gravity is unlike every other
force in nature, and there isn't a force carrier particle for it.
Gravity is just what happens when you have so many particles pressing
down on space -- it just wants to sag, and thus it brings the
particles closer together, making space sag even more, until one of
the other forces stops them from coming any closer together. Such a
type of gravity is more difficult to evaluate and how the photons of
the EM affect it are difficult to tell. But if the Strong force can
affect gravity (by increasing the mass of your body), then I'm sure EM
can affect gravity too in some more subtle way which we haven't
discovered yet.
Yousuf Khan
Kumar
Thanks. I think, tornado effect are centrpetal & centrifugal . In
centripetal effect things will move to center & so the particles. This
effect can cause things to move downwards. ?? How rotation effect of
earth & attractive forces of other plannets on earth/us got
neutralized? When other planets can effect earth, why we on earth are
not effected?
Btw, is it possible that forces/energy can have only one positive/pull
charge ? Is it possible that we get push from earth but it is resisted
by some other force eg.EM?
YKhan
> Thanks. I think, tornado effect are centrpetal & centrifugal . In
> centripetal effect things will move to center & so the particles. This
> effect can cause things to move downwards. ?? How rotation effect of
> earth & attractive forces of other plannets on earth/us got
> neutralized? When other planets can effect earth, why we on earth are
> not effected?
We are affected by the gravity of other planets. Just look at the
Moon, it raises tides on Earth.
> Btw, is it possible that forces/energy can have only one positive/pull
> charge ? Is it possible that we get push from earth but it is resisted
> by some other force eg.EM?
There is no single rule that classifies each force. The Strong force
is a pull force. The Weak force is a push force. The EM is both a push/
pull force. And Gravity is pull. And now Dark Energy is a push.
Yousuf Khan
Androcles
"YKhan" <yjk...@gmail.com> wrote in message
news:dbfcc1d6-b503-465d...@q16g2000vbc.googlegroups.com...
We are affected by the gravity of other planets. Just look at the
Moon, it raises tides on Earth.
==========================================
The tides don't move, the Earth turns inside its water bubble.
==========================================
Y.Porat
-----------------
look for the 'Circlon'
Y.P
----------------------
glird
> On Dec 13, 12:55 pm, "Y.Porat" <y.y.po...@gmail.com> wrote:
> > On Dec 13, 6:35 am, Sam Wormley wrote:
> > > On 12/12/09 10:21 PM, Kumar wrote:
> > all attraction forces are ... push forces !!!
> > Y.Porat
> How?
> Some forces can be repelling at the end .:)
A "force" is a net pressure. A "force of attraction" is an applied
pressure that pushes a body *toward* the source of whatever causes
that net pressure to exist. A "force of repulsion" is a net pressure
that pushes an object *away from* the causative agent.
In all cases, that which transmits and exerts the pressure is
compressible matter; and that against which the force pushes is
compressible matter formed into particles.
glird
Kumar
> On Dec 15, 5:52 am, Kumar <lordshiva5...@gmail.com> wrote:
>
> > Thanks. I think, tornado effect are centrpetal & centrifugal . In
> > centripetal effect things will move to center & so the particles. This
> > effect can cause things to move downwards. ?? How rotation effect of
> > earth & attractive forces of other plannets on earth/us got
> > neutralized? When other planets can effect earth, why we on earth are
> > not effected?
>
> We are affected by the gravity of other planets. Just look at the
> Moon, it raises tides on Earth.
How moon raises tides? Is it real atractive force or just due to
position changes?
Kumar
and from where this pressure come?
glird
> On Dec 16, 10:36 pm, glird <gl...@aol.com> wrote:
>> On Dec 13, 3:04 am, Kumar <lordshiva5...@gmail.com> wrote:
>>>> On Dec 13, 6:35 am, Sam Wormley wrote:
>>>>> On 12/12/09 10:21 PM, Kumar wrote:
>
> > ><<<< In common logic, basic purpose of gravity should be to keep things grounded. >
> > ><<< Nature is the way she is. You are trying to assign purpose!>
> > > > Y.Porat
> > > How?
> > > Some forces can be repelling at the end .:)
>
applied pressure that pushes a body *toward* the source of whatever
causes that net pressure to exist. A "force of repulsion" is a net
pressure that pushes an object *away from* the causative agent.
In all cases, that which transmits and exerts the pressure is
compressible matter; and that against which the force pushes is
compressible matter formed into particles. >
> and from where does this pressure come?
Thank you for asking that excellent question!
Insofar as a "force of repulsion" is concerned, the answer is
obvious: The net pressure comes from the kinetic energy of massive
objects hitting a reacting body.
Insofar as a "force of attraction" is concerned, however, the answer
-- though the same in all three cases -- is a bit more complicated.
It depends on whether you are talking about a gravitational force or a
magnetic or electrical force.
The ANSWER is: The net pressure arises INSIDE of a responding body.
The complication {which should prompt a followup question:} is what
CAUSES this pressure to arise is different in detail -- though not in
general -- wrt g-force compared to magnetic and electrical force, both
of which can be attractive AND/OR repulsive.
glird
Kumar
Thanks, however I need more clarity. Further, Why can't any force
(mechanical) exist on earth due to rotation of earth & due to
influence of other plannets?