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Public evidence

physics.kinematics.free_fall

Machine-checked verification for calculation version 1.0.1 · tier expert_verified

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP status

CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance

Constant g; no drag

Declared partition coverage
PASS · 2/2 declared partitions (fall, invalid-domain)
Versions
Calculation 1.0.1 · CVP protocol 1.0.0-proposed
CVP identity
1/1 property · digest 794cf278f6df

Verification

Legacy regression suite: 3/3 calculation tests · Production surface contract 6/6

Three distinct suites: educational examples on the calculator page, this legacy regression count (3/3 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

    This calculator CURRENT · Public schema 1.0.1 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Calculation version 1.0.1. CVP 1.0.0-proposed. 1/1 golden · 1/1 CVP boundary · 1/1 invalid · 1/1 property · 1/1 cross-interface · 6/6 CVP contract. digest 794cf278f6df.

  • Golden (oracle-backed) 1 / 1
  • CVP boundary 1 / 1
  • Invalid input 1 / 1
  • Property 1 / 1
  • Cross-interface 1 / 1
  • CVP contract 6 / 6
  • Interfaces PASS · UI (SSR) / REST / MCP
  • Interface claim ui-ssr is query-result HTML, not a live browser session.
  • Assurance Engineering
  • release artifacts aligned PASS
  • schema output required declared PASS
  • schema valid input executes PASS
  • engine success output validates schema PASS
  • schema rejects incomplete input PASS
  • rest success payload validates schema PASS

Fingerprint sha256:198a5b74c2710ccd058c67f1ad55cdc1931f85e28a70a61098fef3be75dc8b09

Input schema sha256:014356aa9fb32b0b8006decc1d5390e92b8f8f1f8817fd330639f28ce677d4ab · Output schema sha256:e1fb87e6da93f687c67a2ed342edf1c49224ea674fc08a1abea3de83565a31c8 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool
free-fall
Engine
free-fall
Engine build
2026-09-21
Evidence core
2026-09-21T15:54:02.547Z
Rendered
2026-09-21T16:00:36.091Z
Last reviewed
2026-08-09

Limitations

  • No drag; constant g

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

IDKindStatusDetail
sgoldenpassExpected s_m=19.6133 · Actual mode=s · u_m_s=0 · g_m_s2=9.80665 · t_s=2 · s_m=19.6133
badboundarypassExpected VALUE_MUST_BE_NON_NEGATIVE · Actual VALUE_MUST_BE_NON_NEGATIVE
property-ff-gpropertypassg