You are here:
Home Jack Sarfatti's Blog My refutation of Jim Woodward's Mach Thruster Rocket Engine Theory

Let's start with the rock being swung on a string and then move on to Sciama and other issues.

The rock: I pull on the string as I give it some initial velocity and set it into uniform circular motion. In order to maintain that motion -- neglecting friction and windage -- I must continue to apply a constant centrepital force on the string that is communicated to the rock. At any instant I ask: what force(s) are acting on the rock?

Jack: Sure, so what?

Jim: The obvious force in play is that exerted by the string, analyzed microscopically it is electrical,

Jack: Correct.

Jim: but that is not important. What is important is that this force is the one that figures into Newton's second law, the equation of motion.

Jack: True, of course. That real electrical force pushes the rock off a timelike geodesic in the real geometrodynamic field most aptly expressed by the GCT local scalar invariants (same in every coincident set of LNIFs) {e^I, S^I^J} from which ds^2, Ruvwl etc. can be computed.

Jack: This is expressed LOCALLY in classical field theory simply by Tuv^;v = 0 in a LNIF. Locally 1905 SR works. That's the EEP, so that we also have in a coincident LIF TIJ^,J = 0 for all the matter fields. One can go from a classical field theory to a particle picture if one likes, but this is good enough.

Action-reaction 3rd law is contained in TIJ^,J = 0 from local spatial translation invariance. End of story, no need for cosmology here - no need for some ineffable nonmeasurable meta-theoretical phi = c^2.

http://en.wikipedia.org/wiki/Stress–energy_tensor

Jack: I still find your writing a bit obscure. So now do we agree

1) "inertial mass" = "gravitational mass" = relativistic mass M = m0(1 - v^2/c^2)^-1/2?

Newton's 2nd law is

2) DP^u/ds = F^u

3) P^u = Mdx^u/ds

4) ds^2 = guv(LNIF)dx^udx^v = nIJ(LIF)e^Ie^J EEP

Newton's 3rd Law is contained in LOCAL

5) TIJ^,J (Matter) = 0

Yes? No?

Jack: I have read Wilczek's book. I find your above remark still unintelligible.

The Higgs process + QCD + nuclear + atomic +solid state physics "explain" the origin of m0 for any material object. So what precisely are you saying here? What mathematical object in the theory are you talking about?

Jack: Right, it comes from m0.

Jack: Unintelligible to me. What's the problem? The string pulls the rock off a geodesic with an electrical force. The rock pulls back on the string with an equal and opposite ELECTRICAL FORCE according to the equation

TIJ^,J(LIF) = 0

One must include all relevant LOCAL degrees of freedom of source fermion particles and gauge force mostly VIRTUAL bosons. What we have however is a coarse-grained lumped parameter description with many microscopic details averaged out - as in elasticity theory.

Jack: I see no need to invoke the quantum vacuum here as any zero order dominant factor.

Jack: Your position then, Jim, I find completely wrong from the git-go. Newton's theory of gravity force is not adequate for these fundamental questions. There is no such thing as a real gravity force in Einstein's theory.

Newton's gravity force F = - Gmm'/r^2 is completely contained in the Levi-Civita-Christoffel torsion-free metric connection {^uvw} in the GEODESIC FORCE-FREE equation

DP^u(test particle)/ds = 0 i.e. Newton's FIRST LAW of MOTION

Newton's 2nd law of motion is

DP^u(test particle)/ds = F^u(electromagnetic-weak-strong)

Newton's 3rd law of motion of action-reaction is

DP^u/ds = 0

for pairs of interacting particles.

See Feynman's Lectures Vol 1 for complications in 3-particle ---> N-particle systems - and one must include the EM field (e/c)A vector potentials, i.e.

P^u(charge) = MdX^u(charge)/ds + (e/c)A^u(EM field)

TO AVOID PARADOXES WITH NON-CENTRAL LORENTZ FORCES ON TWO CHARGES MOVING AT RIGHT ANGLES TO EACH OTHER, FOR EXAMPLE where the Lorentz magnetic forces do not cancel and are in different directions!

Also there is the issue of retardation and advanced time delays, though for the string-rock problem that can be ignored to good approximation I think.

Note that if you deny the existence of the inertial reaction force acting on the string as it exerts a centrepital force on the rock, you are violating Newton's third law.

Now, as to whether Paul's view of inertia as something that's not really a force, though it results in a force versus my claim that the force is gravity. It is a matter of simple calculation -- Sciama's calculation in fact -- to show that in the vector approximation to GR, the inertial reaction force is due to gravity. If GR is right (it is), then in our universe at the present epoch, inertial reaction forces are due to gravity. You can't have it more than one way here. It's what the theory says.

Why is my last assertion true? Because we now know as a matter of fact that the universe is spatially flat. That means that "critical cosmic matter density" obtains. And that in turn means that phi = c^2. This is not my interpretation. This is standard GR cosmology. It's the reason why Steven Weinberg years ago talked about a three pound universe, and Laurence Krauss now talks about a universe from "nothing". The gravitational energy just balances the non gravitational energy in a critical cosmic matter density universe; and that means phi = c^2. To see this, multiply through by the mass M of the universe M phi = Mc^2.

Armed with the knowledge that phi = c^2 for us here and now, we can put this knowledge into Sciama's vector approximation calculation of the gravitational action of the universe on an accelerating object (due to the action of a non-gravitational force pushing it off it's local geodesic). What we find is:

E(grav) = - grad phi - (1/c)dA/dt

where A is the gravimagnetic vector potential. The vector potential has mass current sources, and as Sciama notes, in the instantaneous frame of the accelerating object, all of the matter in the universe appears to be moving past the object with velocity - v. So when we integrate the mass currents rho v, we can take the v out of the integral and just compute the matter density rho contribution to the integral. Amazingly enough, that integral just turns out to be phi (times 1/c), so we get:

E(grav) = - (phi/c^2) dv/dt = - (phi/c^2) a.

Grad phi is zero as there are no local mass concentrations of importance by assumption. We now multiply this calculated value of the gravelectric field strength seen by the accelerating object by the mass of the object to get the force on the object due to the gravitational action of the universe and take into account our factual knowledge that phi/c^2 = 1 (from the WMAP results) to get:

F(grav) = E(grav) m = - ma.

This is the inertial reaction force required by Newton's third law. It is due to the action of gravity, not the quantum vacuum or the Higgs process, or whatever. You may not like this. But this is what standard GR says.

I'm going to leave most of the questions about Sciama and the speed of light to another email tomorrow to let this sink in. But I will make one comment. You may be wondering: Why aren't there effects like this in electrodynamics? After all, it's a vector theory too, and almost identical to vector approximation gravity. The answer is simple. When you integrate the sources of the EM vector potential -- electric charge currents -- over the universe, you get zero. Why? Because the universe, at cosmic scale, is charge neutral. So rho on average is zero and the vector potential vanishes. In the case of gravity this isn't so; and the vector potential does not vanish.

If you want to object that Sciama's calculation is just an approximation, be careful. Inertial reaction forces are not small effects that might be artifacts of the approximation used. They are as large as the forces that excite them. That is, very large and not an approximation artifact. After all, we're talking about the action of the whole blasted universe.

Tomorrow I'll deal with the stuff about the speed of light in GR and why phi, like c, is a locally measured invariant. Unless, that is, we're still stuck on what an inertial reaction force is and what produces them. :-)

Category: MyBlog

Written by Jack Sarfatti

Published on Monday, 20 February 2012 10:07

't Hooft 100 Year Star Ship Abner Shimony accelerometers action-reaction principle Aephraim Sternberg Alan Turing Albert Einstein Alpha Magnetic Spectrometer American Institute of Physics Andrija Puharich Anthony Valentin Anton Zeilinger Antony Valentini anyon Apple Computer Artificial Intelligence Asher Peres Back From The Future Basil Hiley Bell's theorem Ben Affleck Ben Libet Bernard Carr Bill Clinton black body radiation Black Hole black hole firewall black hole information paradox black holes Bohm brain waves Brian Josephson Broadwell Cambridge University Carnot Heat Engine Central Intelligence Agency CIA Clive Prince closed time like curves coherent quantum state Consciousness conservation laws Cosmic Landscape Cosmological Constant cosmology CTC cyber-bullying Dancing Wu Li Masters Dark Energy Dark Matter DARPA Daryl Bem David Bohm David Deutsch David Gross David Kaiser David Neyland David Tong de Sitter horizon Dean Radin Deepak Chopra delayed choice Demetrios A. Kalamidas Demetrios Kalamidas Dennis Sciama Destiny Matrix Dick Bierman Doppler radars E8 group Einstein's curved spacetime gravity Einstein's happiest thought electromagnetism Eli Cartan EMP Nuclear Attack entanglement signals ER=EPR Eric Davis Ernst Mach ET Eternal Chaotic Inflation evaporating black holes Facebook Faster-Than-Light Signals? fictitious force firewall paradox flying saucers FQXi Frank Tipler Frank Wilczek Fred Alan Wolf Free Will G.'t Hooft Garrett Moddel Gary Zukav gauge theory general relativity Geometrodynamics Gerard 't Hooft Giancarlo Ghirardi God Goldstone theorem gravimagnetism gravity Gravity - the movie gravity gradiometers gravity tetrads Gravity Waves Gregory Corso gyroscopes hacking quantum cryptographs Hagen Kleinert Hal Puthoff Hawking radiation Heisenberg Henry Stapp Herbert Gold Higgs boson Higgs field hologram universe Horizon How the Hippies Saved Physics I.J. Good ICBMs Igor Novikov inertial forces inertial navigation Inquisition Internet Iphone Iran Isaac Newton Israel Jack Sarfatti Jacques Vallee James F. Woodward James Woodward JASON Dept of Defense Jeffrey Bub Jesse Ventura Jim Woodward John Archibald Wheeler John Baez John Cramer John S. Bell Ken Peacock Kip Thorne Kornel Lanczos La Boheme Laputa Large Hadron Collider Lenny Susskind Leonard Susskind Levi-Civita connection LHC CERN libel Louis de Broglie Lubos Motl LUX Lynn Picknett M-Theory Mach's Principle Mae Jemison Making Starships and Star Gates Martin Rees Mathematical Mind MATRIX Matter-AntiMatter Asymmetry Max Tegmark Menas Kafatos Michael Persinger Michael Towler microtubules Milky way MIT MOSSAD multiverse NASA Nick Bostrum Nick Herbert Nobel Prize nonlocality Obama organized-stalking Origin of Inertia P. A. M. Dirac P.K.Dick P.W. Anderson Paranormal parapsychology Paul Werbos Perimeter Institute Petraeus Physical Review Letters Physics Today Post-Quantum Physics pre-Big Bang precognition presponse PSI WARS Psychic Repression qualia Quantum Chromodynamics quantum computers quantum entanglement quantum field theory quantum gravity Quantum Information Theory Quantum Theory RAF Spitfires Ray Chiao Red Chinese Remote Viewing retrocausality Reviews of Modern Physics Richard Feynman Richard P. Feynman Rindler effect Robert Anton Wilson Robert Bigelow Roger Penrose rotating black holes Roy Glauber Rupert Sheldrake Russell Targ Ruth Elinor Kastner S-Matrix Sagnac effect Sam Ting Sanford Underground Research Facility Sarfatti Lectures in Physics Scientific American Second Law of Thermodynamics Seth Lloyd signal nonlocality Skinwalker Ranch social networks space drive space-time crystal SPECTRA - UFO COMPUTER spontaneous broken symmetry SRI Remote Viewing Experiments Stanford Physics Stanford Research Institute Star Gate Star Ship Star Trek Q Stargate Starship Stephen Hawking Steven Weinberg stretched membrane string theory strong force gluons Stuart Hameroff superconducting meta-material supersymmetry symmetries telepathy Templeton The Guardian Thought Police time crystal time travel topological computers Topological Computing torsion UFO Unitarity unitary S-Matrix false? Unruh effect Uri Geller VALIS virtual particle Virtual Reality Warp Drive weak force Wheeler-Feynman WIMP WMAP WMD world crystal lattice wormhole Yakir Aharonov Yuri Milner

- November 2015(1)
- January 2015(1)
- December 2014(1)
- August 2014(2)
- July 2014(2)
- June 2014(2)
- May 2014(1)
- April 2014(6)
- March 2014(6)
- February 2014(1)
- January 2014(3)
- December 2013(5)
- November 2013(8)
- October 2013(13)
- September 2013(8)
- August 2013(12)
- July 2013(3)
- June 2013(32)
- May 2013(3)
- April 2013(6)
- March 2013(6)
- February 2013(15)
- January 2013(5)
- December 2012(15)
- November 2012(15)
- October 2012(18)
- September 2012(12)
- August 2012(15)
- July 2012(30)
- June 2012(13)
- May 2012(18)
- April 2012(12)
- March 2012(28)
- February 2012(15)
- January 2012(25)
- December 2011(29)
- November 2011(30)
- October 2011(39)
- September 2011(22)
- August 2011(41)
- July 2011(42)
- June 2011(24)
- May 2011(13)
- April 2011(13)
- March 2011(15)
- February 2011(17)
- January 2011(31)
- December 2010(19)
- November 2010(22)
- October 2010(31)
- September 2010(41)
- August 2010(30)
- July 2010(27)
- June 2010(12)
- May 2010(20)
- April 2010(19)
- March 2010(27)
- February 2010(34)