TR-PINK-F-096 / Teal / Review draft

Drag force

Terminology revised · September 12 evidence

Later individual Teal rerun. The reported execution status is historical and is not a new test result.

TEAL LIBRARY RERUN  |  12 SEPTEMBER 2026  |  Michael Patrick Bangel
117
TEAL-RERUN-02-B005 | SCOPED_EXECUTION_VERIFIED
TR-PINK-F-096 / Drag force
IF
Invoke F-096 with exactly these inputs: drag_coefficient: Real, density: Real, area: Real, velocity: Real. Real
values use finite decimal text; null remains unknown.
HOW
Source expression: F_d=0.5*C_d*rho_ambient*A_projected*u*abs(u). Current Bangel expression: 0.5 *
drag_coefficient * density * area * velocity * math.abs(velocity). Require every input to be known. Require
drag_coefficient >= 0.0 and density > 0.0 and area > 0.0.
THEN
Emit the scoped calculation result. Missing inputs produce their specific PINK_MISSING_* HOLD; failed profile
checks produce PINK_DOMAIN. A false numeric predicate can occur in a PASS calculation receipt; it is not
permission.
CURRENT EVIDENCE
Fixture inputs {"drag_coefficient": "2", "density": "1", "area": "3", "velocity": "-2"}; expected -12. Result
matched through Bangel, admitted JP, the Bangel API, with validated receipt outputs. 4 missing-input cases
and 1 supplied domain cases passed.
SOURCE DIMENSION
force
REMAINING REQUIREMENT
Complete the source-defined measurement/evidence contract, units and calibration bindings. Native C# and Hagar formula-ID
bindings remain unverified in this rerun.
SOURCE REFERENCES
D006 pp. 213,214; D012 pp. 97,98
Evidence: evidence/rerun/pink/F-096.json

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