Received 10 November 2015; accepted 26 February 2016; published 29 February 2016
According to Newton, gravity is proportional to mass, and Einstein claimed that gravity is expressed through the curvature of space time. Although these are important features of gravity, neither addresses the cause of gravity  . Therefore further elucidations are desirable.
In general relativity it is accepted that gravity is the same as any other acceleration, and as said, gravity is also proportional to a body’s mass. That implies that the inertia of a body, together with its mass, causes its gravitational effect. In other words, the mass of a body and its energy are its inertial mass  . Therefore, what causes gravity of any body is its inertial mass.
As the mass of a body is made up of atoms, which are made up mainly by quarks, the inertial mass-effect of an object at rest is related predominantly to the quarks. So the mass-effect of an object at rest is dependent on its quarks inertial mass. This inertia is a result of the velocity of movement of the quarks oscillation within the proton or neutron. Therefore, quark oscillation causes gravity  which is analogous to electron oscillation causing electromagnetic radiation. Electromagnetic radiation is made when an atom absorbes energy. The absorbed energy causes electrons to change their locale within the atom. When the electron returns to the original position, an electromagnetic wave is produced. Similarly, the back and forth movement of the oscillating quarks within the atom, which is related to the potential energy of matter, ensues in the production of gravitation. The potential energy of matter converts into other forms of energy, that of electrons into electromagnetic energy and that of quarks, into gravitational force.
The velocity of quarks within the nucleon is near the speed of light. According to a previous publication  , with the increase of the velocity of a particle, its gravitational effect increases, due to an increase of the object’s inertia and thereby an increase in the gravitational effect, and so also―of the gravitational constant.
In that previous manuscript it was shown that the stronger force required to accelerate a faster moving object is due to an increase of the object’s inertia, not its relativistic mass. As inertia and gravity are actually the same  , with increase of velocity, thereby increase in inertia, also the gravitational effect of an object increases. As
with the increase of the gravitational effect of an object, also the gravitational constant G increases,
so with increase of an object’s velocity, “g” increases and thereby also “G” increases. To calculate the increase of “G” with velocity, formulae were developed   :
This equation applies to objects moving apart from each other.
This equation applies to objects approaching each other.
2. Effect of Quark Motion
Gravity acts between quarks  just like between any particles and quarks back and forth movement is almost at the speed of light  . Therefore the gravitational effect between them is much stronger than between slow moving or stationary objects. Gravity is the result of the back und forth movement of the quarks within the nucleon, so it is a sequence of the strong nuclear force. This back and forth quark movement is also referred to as quark vibration   or oscillation  .
That explains why the gravitational force between quarks is 1038 stronger than between objects outside of the proton and neutron. This is the strong nuclear force. For that reason there is no real requirement for the existence of gravitons  . The strong force acting between quarks within the nucleons, provides the link between matter and gravity. Quark zig-zag within the nucleon  is a back and forth motion. That means that they also move in opposite directions. Quarks approach each other as well as moving apart from each other. So it can be concluded that the strong force also acts in opposing directions. Forces that act in opposite directions obviously annihilate each other. They even might extinguish or abolish each other altogether. As described in the previous publications   , what holds true for gravitation also applies to the strong force. That means that there is a small difference between the force acting on receding objects to that of approaching objects.
For objects moving at the speed of light, whatever their direction, the force is infinite and therefore extinguish each other. However, objects moving a fraction slower than the speed of light, a small difference between these forces exists. The force acting on receding objects is a trifle stronger than that acting on approaching objects. This difference can be calculated by the mentioned formulae. This small difference between the two forces, acting in opposite directions, is not completely annihilated. So there remains a small, almost redundant “left over” force. This “left over” fraction of the strong force leaks out of the nucleon. Some of it is the proton neutron binding force but it is also gravity.
3. Estimation of v/c for Strong Force Leakage
Gravity is a weak residuum of the strong froce, which leaks out of the nucleon. Similarly, the nuclear force which binds protons and neutrons, called nuclear force, is also a residuum of the strong force. Both of these resudies are “left over” forces from the strong force. The strong force acts mainly within the protons and neutrons, binding the quarks together. However, a minute portion of this force is “left over”, and “leaks” out of the nucleon. They are “left over” after the mutual annihilation of the strong forces acting in opposite directions. Some of the so called “left over” strong force, also called “remnant” of the strong force, after cancelling effects of the strong force, is the nuclear force―acting between protons and neutrons. Another portion of that “left over” strong force leaks out of the nucleons as gravity. The ratio of the strong force to gravity is 1038. Therefore only a fraction of the strong force leaks out of the nucleon as gravity. The proportion of the strong force which leaks out of the nucleons to become gravity, can be calculated by the presented formulae. This is done by substracting the formula applied to objects approaching each other from that applicable to objects receding from each other. This substraction results in force leaking out of the nucleon. It is twice the right hand side of these formulae:
This, as it is accepted that the strong force is 1038 times stronger than gravity.
The formula results in value of:
is the square root of that value which gives the decimal approximation of:
So solving this equation gives the v/c ratio:
The quarks reach such high speeds has been mentioned in many physical publications. These include quotes that quarks move inside the nucleon by speeds that are comparable to the speed of light   ; or that there velocity is near the need of light  ; or very close to that of light and they behave like massless particles  ; and that two Lorentz contrasted nuclei approaching each other with velocities nearly equal to the velocity of light  or even that quark velocity is the speed of light  .
The described mechanism can be applied both in relativistic physics and as well in classical physics or quantum mechanics. It is usually assumed that when quantum mechanics and relativity are brought together, an epic conflict between the two theories results. Apparently, they both cannot be right  . The herewith presented explanation of the mechanism of action of gravity is valid both if it is an attracting accelerating force or if it is curving space time. Neither does it require none sensible dimensionsnor strings or wormholes. It does not matter if the superiority of the theory of relativity―special and/or general―over classical physics are advocated or not  . The here presented mechanism copes with both attitudes. Efforts to unify the two great theories of physics of General Relativity and of quantum theory have little success. The paper presented here is a step forward in their unification.
It is generally expected that a grand unified theory of all forces exists, however, no such theory has been successfully formulated, and the unification remains an unsolved problem in physics. Gravity still remains one of the biggest mysteries of physics and the biggest obstacle to a universal theory that describes the functions of every interaction in the universe  . Gravity, as elucitated by the herewith presented mechanism, solves the unification problems in physics. The two mainstream theories of physics, the general relativity (GR) and the quantum field theory (QFT), as they are currently formulated, are mutually incompatible―they cannot both be right  . It is the acceleration of energy of the quarks within a particle and the particle’s motion that produces inertia, and consequently―gravity. This mechanism of gravity suits any hypothesis, so solves the unification problem.