ABSTRACT The ontological status of energy and work is examined through a historical and philosophical lens, tracing the concept from Aristotle's energeia (actuality or being-at-work) and dynamis (potentiality) to modern physics. While classical and contemporary physics treat energy as a conserved, relational, frame-dependent scalar quantity—a bookkeeping device tied to time-translation symmetry (Noether's theorem) rather than a substantive entity—work emerges as a more concrete, measurable process of energy transfer and change. Drawing on Aristotle's distinction between potentiality and actuality, Joule's disproof of caloric theory, Feynman's emphasis on energy as a numerical invariant, and quantum field theory's vacuum fluctuations, we argue that energy remains abstract and derived, lacking independent ontological standing. In contrast, work—as ceaseless activity, transformation, and actualization—claims greater ontological primacy: it is the observable, causa...
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