Tuesday, 2 December 2025

Rethinking Acceleration: From Kinematic Change to Second-Order Actualisation

In Newtonian mechanics, acceleration is defined as the rate of change of velocity over time. It marks the effect of a force acting on a mass, causing it to change direction or speed. It plays a central role in classical dynamics and remains essential to relativistic and quantum accounts of motion.

But like velocity and momentum, acceleration presupposes entities — things with position, speed, and mass. In relational terms, this foundation collapses: without substances or trajectories, we must redefine acceleration not as something experienced by an object, but as a second-order shift in the dynamics of relational actualisation.


1. The Classical View: Change in Change

  • Acceleration is conventionally a second derivative: the rate at which velocity changes with respect to time,

  • It measures how quickly a particle is speeding up, slowing down, or changing direction,

  • But this view assumes particles, trajectories, and a continuous spatial background — all of which a relational ontology dissolves.


2. Acceleration Without Entities

  • If there are no entities moving through space, there can be no literal “change in speed,”

  • Instead, we consider how configurations of potential unfold — and how that unfolding itself can shift,

  • Acceleration becomes: a change in the rate at which actualisation proceeds through a relational field.


3. Second-Order Actualisation

  • We can think of a relational system as traversing a topology of constraints — unfolding from one configuration to the next,

  • The rate at which this unfolding occurs corresponds to momentum or transition pressure,

  • But if the rate of that rate changes — if the system speeds up or slows down in its transformation — this is relational acceleration.


4. Acceleration as Constraint Dynamics

  • Forces don’t “act on bodies” — they are shifts in the structure of constraints that reshape what’s possible,

  • From a relational perspective, forces are modulations in systemic affordances, and acceleration is the system’s reconfiguration in response,

  • Thus, acceleration is not the result of an external push, but the internal realignment of potential in a field responding to altered coherence conditions.


5. Non-Uniform Actualisation

  • In a static relational topology, actualisation might proceed at a steady pace (analogous to constant velocity),

  • But when the topology itself is curved, compressed, or destabilised, the system reorganises more rapidly or more slowly,

  • Acceleration, then, is an index of curvature in potential space — a second-order derivative of actualisation constrained by systemic structure.


Relational Definition

We might say:

Acceleration is the second-order modulation of actualisation within a relational field — the changing rate at which a system reconfigures under evolving constraints.

In this view, acceleration does not describe the behaviour of a body, but the increasing or decreasing coherence pressure across a field of constrained potential.


Closing

In the object-based model, acceleration describes how things change speed. In the relational model, it reveals how systems shift their unfolding pathways — a deeper measure of transformation. It is not a force applied to a thing, but a symptom of relational instability and emergent reorganisation.

In the next post, we’ll take up the concept of force itself — the apparent cause of acceleration — and explore how a relational ontology reframes it as gradient tension in the fabric of potential.

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