Source: https://guthlabs.ai/docs/instruments/impulse-momentum-calculator/implementation/

instrument implementation / implementation-contract

# Impulse-Momentum Calculator implementation

A source-bound implementation contract for Impulse-Momentum Calculator; 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**: t4-191

**Effect**: Computation or source lookup only

## Input and validation requirements

A zero-mass input creates an undefined velocity-change result through division by zero. The sign convention is also underspecified: treating force as signed versus magnitude-only changes both impulse and velocity-change signs.

## 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": {
    "F_N": 120,
    "delta_t_s": 0.25,
    "m_kg": 60
  },
  "expected_outputs": {
    "J_Ns": 30,
    "delta_v_m_per_s": 0.5
  },
  "working": "J=FΔt=120 N×0.25 s=30 N·s. Δv=J/m=30 kg·m/s÷60 kg=0.5 m/s."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/impulse-momentum-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/impulse-momentum-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/impulse-momentum-calculator/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-tranche4/tranche4-results.json`