{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.velocity","code":"thing-q11465","url":"https://ver.cy/models/thing/q11465/","name":"velocity","alternateNames":["Gravitsapa","phase velocity","orbital speed","sound particle velocity","peripheral velocity","sound wave velocity","molecule local average velocity","wind velocity","exhaust velocity","slower-than-light","climate velocity","train speed"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.QLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A vector quantity giving the rate of change of position of an object with respect to time, including both speed and direction, measured in metres per second; related quantities include phase velocity and orbital speed.","purpose":"Let an agent handle velocity by definition, calculation, frame of reference and applications, distinguishing it from speed.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Vector quantity","Depends on reference frame","Derivative of position","Changes with acceleration"],"structure":{"bundles":[{"id":"quantity","name":"Quantity","description":"Definition.","layers":[{"id":"value","name":"Value","description":"Magnitude and direction.","findings":[{"id":"value-finding","name":"Value","description":"Velocity value.","questions":[{"text":"What are the magnitude and direction of the velocity?","kind":"measurement"},{"text":"In which units?","kind":"definition"}]}]},{"id":"frame","name":"Frame","description":"Reference frame.","findings":[{"id":"frame-finding","name":"Frame","description":"Reference frame.","questions":[{"text":"Relative to which frame is it measured?","kind":"definition"},{"text":"How does it change in another frame?","kind":"measurement"}]}]}]},{"id":"calculation","name":"Calculation","description":"Methods.","layers":[{"id":"average","name":"Average","description":"Displacement over time.","findings":[{"id":"average-finding","name":"Average","description":"Average velocity.","questions":[{"text":"What is the average velocity over this interval?","kind":"measurement"},{"text":"How does it differ from average speed?","kind":"definition"}]}]},{"id":"instantaneous","name":"Instantaneous","description":"Derivative.","findings":[{"id":"instantaneous-finding","name":"Instantaneous","description":"Instantaneous velocity.","questions":[{"text":"What is the instantaneous velocity at this time?","kind":"measurement"},{"text":"How is it derived?","kind":"definition"}]}]}]},{"id":"applications","name":"Applications","description":"Uses.","layers":[{"id":"orbits","name":"Orbits","description":"Orbital speed.","findings":[{"id":"orbits-finding","name":"Orbits","description":"Orbital velocity.","questions":[{"text":"What orbital velocity is needed at this altitude?","kind":"measurement"},{"text":"Which formula applies?","kind":"definition"}]}]},{"id":"waves","name":"Waves","description":"Phase and group.","findings":[{"id":"waves-finding","name":"Waves","description":"Wave velocities.","questions":[{"text":"Is phase or group velocity meant?","kind":"boundary"},{"text":"How do they differ?","kind":"definition"}]}]}]},{"id":"teaching","name":"Teaching","description":"Learning.","layers":[{"id":"explain","name":"Explain","description":"Examples.","findings":[{"id":"explain-finding","name":"Explain","description":"Explanation.","questions":[{"text":"How can velocity be explained with an everyday example?","kind":"action"},{"text":"Which diagram helps?","kind":"action"}]}]},{"id":"errors","name":"Errors","description":"Common mistakes.","findings":[{"id":"errors-finding","name":"Errors","description":"Common mistakes.","questions":[{"text":"Is direction being ignored?","kind":"boundary"},{"text":"How can it be corrected?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Compute and report velocities with units and reference frame.","Read speed data from sensors the agent is authorized to use."],"mustNot":["Report speed without direction or frame where the difference matters.","Operate a vehicle or machine above a safe or permitted speed.","Track a person's speed and movement without consent or legal basis.","Mix up units, such as knots and kilometres per hour, in navigation or safety calculations."],"requiresHuman":["Using velocity data as evidence against a person, such as for speeding."]},"ethics":{"considerations":["Speed kills on roads and at work; accurate measurement matters for safety.","Movement data reveals where people go."],"affectedParties":["Road users and pedestrians","Students and engineers"]},"owners":{"steward":"Nobody: a physical quantity held in common.","roles":[],"masterSystems":[]},"relations":[{"target":"Q107715","type":"parent","note":"registry parent class"},{"target":"Q141256417","type":"parent","note":"registry parent class"},{"target":"Q2672914","type":"parent","note":"registry parent class"},{"target":"Q30337763","type":"parent","note":"registry parent class"},{"target":"vector quantity","type":"related","note":"category"},{"target":"position","type":"related","note":"relation"},{"target":"acceleration","type":"related","note":"relation"},{"target":"speed","type":"related","note":"scalar"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.velocity","Wikidata: Q11465 (https://www.wikidata.org/wiki/Q11465)","SI unit: metre per second (m/s) unit"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["Magnitude and direction","Units m/s, km/h","Speed is the magnitude only","Not visible; represented by arrows and numbers."]},"capabilities":{"applicability":"required","items":["compute velocity from displacement and time","distinguish velocity and speed","change frames of reference","convert units"]},"hazards":{"applicability":"required","items":["Confusing speed and velocity","Ignoring frame of reference"]},"interfaces":{"applicability":"required","items":["ISO 80000-3 space and time quantities"]},"context":{"applicability":"required","items":["Describing motion in physics and engineering.","instantaneous velocity","average velocity","relative velocity","angular velocity","phase and group velocity"]}},"sources":[{"title":"Wikidata item Q11465: velocity","url":"https://www.wikidata.org/wiki/Q11465","note":"identity and sense of the item"},{"title":"Wikipedia: Velocity","url":"https://en.wikipedia.org/wiki/Velocity","note":"general description of the item"}],"openQuestions":["Should kinds of velocity be separate entries?","How should relativistic velocity be linked?","How should wave velocities be split off?"],"resources":{"spec":"/models/things/publications/thing-q11465/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q11465/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T10:13:09Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:53+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}