Source: https://guthlabs.ai/docs/instruments/rolling-without-slipping-solver/implementation/

instrument implementation / implementation-contract

# Rolling Without Slipping Solver implementation

A source-bound implementation contract for Rolling Without Slipping Solver; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t6-037

**Effect**: Computation or source lookup only

## Input and validation requirements

The specification defines only four recognized shapes and gives no behavior for an unrecognized shape. Without explicit validation, an unknown shape produces an undefined inertia-ratio lookup and therefore an undefined acceleration; the solver must reject it.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "shape": "solid sphere",
    "angle": 30,
    "angle_unit": "degrees",
    "g": 9.80665
  },
  "expected_outputs": {
    "acceleration_m_per_s2": 3.502375
  },
  "working": "k=I/(mR^2)=2/5=0.4. Convert angle: sin(30 degrees)=0.5. Denominator=1+0.4=1.4. Numerator=g sin(theta)=9.80665*0.5=4.903325. Therefore a=4.903325/1.4=3.502375 m/s^2."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/rolling-without-slipping-solver/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/rolling-without-slipping-solver/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/rolling-without-slipping-solver/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche6/tranche6-results.json`