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Kaku's Stone and the Principle of Inertia

Author:

Leon, Antonio

Category:

Research Papers

Sub-Category:

Relativity Theory

Language:

English

Date Published:

July 17, 2025

File:

/Research Papers-Relativity Theory/Download/10209

Downloads:

Keywords:

Inertia, preinertia, uniform relative motion, absolute motion, detection of absolute motion, kinetic energy, linear momentum.

Abstract:

Kaku's stone is an almost dramatic update of a classic argument by Galileo Galilei published in 1632. In that argument, and with the expression “marvelous effect of nature”, Galileo introduces the concept of preinertia. As far as we know, it is the only time in the history of physics that this “marvelous effect” has been considered. Preinertia is, in fact, a property of all physical objects unknown to contemporary physics. A universal and fundamental property: it is the reason why absolute motion is undetectable. And at the same time the reason why the nature of motion can only be absolute, although only the relative motion resulting from the different absolute motions of physical objects through the same real physical space is observable. This paper gives the reasons why preinertia should have been rediscovered from the principles of conservation of linear momentum and energy in an isolated system.