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Further proof gravity is a push...
"Sam Wormley" wrote in message ... Rick Sobie wrote: Lets suppose, that the moon, was a Dyson sphere, and its power unit failed, and its orbit began to decay, then it would hit the earth. Ref: http://scienceworld.wolfram.com/physics/Gravity.html 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. Excuse me? Tell me how gravity is an attractive force, when mass bends spacetime like a rubber sheet with a ball bearing on it. That is the common explanation of GR. Is that what you mean by attractive gravity? That mass on one side of the universe, 50 billion light years across, can affect mass on the other side, when the universe is only 15 billion years old? http://www.americanantigravity.com/hutchison.html this is gravity ... http://www.members.shaw.ca/rsobie/Time_travel.txt If your explanation was correct, Ranger 5 would not have missed the moon by 450 miles and the Beagle 2 would have landed. o Gravity is a longrange interaction. The Newtonian force law ia 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 largescale objects with net electric charge. But the universe is electrically neutral, and electromagnetic forces are so much stronger than gravitational forces that any largescale net charge is quickly neutralized. Gravity is left to govern the structure of the universe on the largest scales. 
#2




Further proof gravity is a push...
"John Harrington" wrote in message ... Rick Sobie wrote: Lets suppose, that you took your meds correctly, for once. What are you supposed to be? A hunter seeker? I laugh at you ha! What a poor excuse for a jawboning bathybius stentorophonic fopdoodle you are. 
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