speed
Let an agent explain and calculate speed, convert units, distinguish specific speeds such as sound and light, and address road speed limits and safety.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain and calculate speed, convert units, distinguish specific speeds such as sound and light, and address road speed limits and safety.
The rate at which an object covers distance, a scalar quantity measured in units such as metres per second or kilometres per hour, distinct from velocity which includes direction; specific speeds include the speed of sound, the speed of light, airspeed in aviation and legal speed limits on roads.
What it is for: Describing motion.
It can be calculate speed from distance and time; convert speed units; explain speed of sound and light; explain road speed limits and safety.
Distinguishing features
Scalar rate of motion
Distance over time
Many units
Reference speeds
What it looks like
Not physical; shown on speedometers and instruments.
Physical character
speed of light in vacuum: 299792458 m/s - exact by definition
speed of sound in air: about 343 m/s - at 20 C
How it is recognised
Speedometers and radar readings
Units such as km/h, m/s and knots
Velocity includes direction
Related models
is a kind of - category
is a kind of - category
is related to - physics
is related to - change of speed
In practice
Families and kinds
instantaneous and average speed
speed of sound and light
airspeed types
road speed and limits
group and phase speed of waves
Standards and regulation
SI units
Road traffic speed limits
Aviation airspeed conventions
Failure modes and hazards
Unit confusion
Speeding and road deaths
Confusing speed with velocity
Also called
+28
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.speed-act
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Calculate Working with speed.
Speed is distance over time.
Compute
Calculation.
Compute
Calculation.
- What is the average speed for this distance and time? measurement
- What is the instantaneous speed? measurement
Units
Conversion.
Units
Conversion.
- How does this speed convert between km/h, mph, m/s and knots? measurement
- Which unit is standard here? provenance
Reference Special speeds.
Some speeds are fundamental.
Sound
Speed of sound.
Sound
Speed of sound.
- What is the speed of sound in this medium and temperature? measurement
- What are Mach numbers? definition
Light
Speed of light.
Light
Speed of light.
- Why is the speed of light constant and a limit? definition
- How does it define the metre? provenance
Road Speed limits.
Limits save lives.
Limits
Legal limits.
Limits
Legal limits.
- What speed limit applies on this road type here? provenance
- What are the penalties for speeding? provenance
Safety
Speed and injury.
Safety
Safety.
- How does speed affect stopping distance and crash severity? measurement
- Is the user asking how to evade enforcement? boundary
Domains Aviation and waves.
Domains define speeds.
Airspeed
Aviation.
Airspeed
Airspeed.
- How do indicated, true and ground speed differ? definition
- Why does it matter for pilots? definition
Waves
Wave speeds.
Waves
Wave speeds.
- How do phase and group speed differ? definition
- When do they diverge? boundary
What the second pass must settle
- Should the speed of light be a separate entry?
- How should speed limits be localised?
- How should airspeed types be linked?