The Physics of Learning: How Race-Architecture Constraints Explain What We Know About Teaching, Communication, and Understanding

Paper 16 in the Friction Theory paper-series. A didactic translation of Friction Theory mechanics to human learning, teaching, and communication for audiences in education research, instructional design, and organisational psychology. Abstract. Three traditions of learning science — cognitive load theory and multimedia learning (Sweller, Mayer); desirable difficulties and retrieval practice (Bjork, Roediger, Karpicke); psychological safety and need-prepotency (Maslow, Edmondson) — are each empirically excellent and mechanically thin. They terminate at cognitive-architecture-as-given, representational-properties-as-given, and behavioural-information-flow-as-given. This paper proposes that the three are local consequences of the same substrate-universal physical constraints: bounded-capacity race-architecture, friction as the cost of unresolved competing routes, hysteresis as encoding-through-loading, and the Net Friction Rule as integrated-friction optimisation. The substrate-level account is empirically anchored by LLM substrates where the mechanism is mechanically visible (Paper 4, Paper 13), and the same constraints derive, rather than postulate, working-memory limits, the testing effect, the spacing effect, expertise reversal, and prepotency of safety-field activity over substantive-content processing. Implications for curriculum design, moment-by-moment classroom diagnosis, technical and organisational communication, and change management are developed. Four falsification conditions are specified. v2 changelog (May 2026) is a substantive revision responding to seven rounds of dual hostile peer-review (ChatGPT + Gemini parallel reviewers) across two target venues. v2 adds ~7,000 new words (~20% expansion) of substantive prior-art engagement and scope-acknowledgment: §6.5 modality-precision now engages dual-coding (Paivio), multisensory integration (Stein Round 4-7 review under MBE confirmed framework merit and venue-fit while documenting MAJOR REVISION plateau on operational-empirical specifics that require the lab partnership §9.6 invites. Full detail in Notes field below. Companion papers in the Friction Theory series (all Zenodo-live): Paper 0 (Behavioural Friction Theory): 10.5281/zenodo.19462499; Paper 1 (Friction Theory substrate): 10.5281/zenodo.20012654; Paper 4 (LLM calibration): 10.5281/zenodo.20059859; Paper 4B (Substrates encode experience): 10.5281/zenodo.20059861; Paper 6 (Matched friction under hysteresis): 10.5281/zenodo.20059863; Paper 7 (Forward-modelling in bounded race substrates): 10.5281/zenodo.20449154; Paper 8 (Pressure, Hysteresis, and Experience: clinical intervention): 10.5281/zenodo.20059865; Paper 13 (Operational Friction Theory): 10.5281/zenodo.20059876. Target venue: Mind, Brain, and Education (Wiley/IMBES; primary) / Educational Psychology Review (secondary) / Educational Theory (tertiary).