USP Field Theory — Newton's Laws Reinterpreted by Δf (msf:45684 – Δf Mechanics)

This paper reinterprets Newton’s three laws of motion within the framework of USP Field Theory, introducing the concept of Δf mechanics — motion, force, and reaction as manifestations of frequency mismatch and field resonance. In this unified model: Inertia (Δf = 0) represents stable spin-tension equilibrium; Force (F = k·d(Δf)/dt) describes deformation under a field tension gradient; Reaction (−Δf) corresponds to restorative resonance returning the system toward equilibrium. The model integrates prior USP parameters — spin-tension (T_f), critical Δf thresholds, and field curvature — showing that classical mechanics is a large-scale expression of geometric field resonance. It predicts that reaction waves decay as 1/Δr² up to cosmic scales (Δr < 10¹² m) and align with observed redshift delays (z ≈ 0.1). This work provides a conceptual bridge between Newtonian mechanics and field-resonant physics, forming a macroscopic layer in the unified USP framework.