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Apergy. Apergy is a fictitious form of anti-gravitational energy first described by Percy Greg in his 1880 sword and planet novel Across the Zodiac. John Jacob Astor IV used it in his 1894 science fiction novel A Journey in Other Worlds.
Newton's classical mechanics were superseded in the early 20th century, when Einstein developed the special and general theories of relativity. An elemental force carrier of gravity is hypothesized in quantum gravity approaches such as string theory, in a potentially unified theory of everything .
Apergy is a hypothetical repulsive force that represents an opposition to gravitation as an attractive force, sometimes described as the centripetal force to gravity's centrifugal force. According to the speculations on apergy, the two forces would neutralise one another, and an increase of apergy would produce an anti-gravity effect.
Isaac Newton was the first to develop a quantitative theory of gravity, holding that the force of attraction between two bodies is proportional to the product of their masses and inversely proportional to the square of the distance between them.
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His theory was a theory of space-time geometry and how mass (and acceleration) distort and interact with that space-time. It was not a theory of gravitational forces. The mathematics of the general theory is beyond the scope of this text, but we can look at some underlying principles and their consequences. The Principle of Equivalence
Aug 11, 2021 · According to the theory of general relativity, gravity is the result of distortions in space-time created by mass and energy. The principle of equivalence states that that both mass and acceleration …
Einstein based his theory on the postulate that acceleration and gravity have the same effect and cannot be distinguished from each other. He concluded that light must fall in both a gravitational field and in an accelerating reference frame.
