torque
Let an agent explain torque and its definition, relay formulas, units and applications from physics and engineering references, describe engine torque and torque tools, and distinguish torque from force, energy and moment of inertia.
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 torque and its definition, relay formulas, units and applications from physics and engineering references, describe engine torque and torque tools, and distinguish torque from force, energy and moment of inertia.
The rotational equivalent of force, the tendency of a force to rotate an object about an axis, defined as the cross product of the position vector and the force and measured in newton metres, so that its magnitude equals force times lever arm, with applications from tightening bolts with torque wrenches to engine torque as a measure of vehicle performance and effective torque in machines; torque is a vector quantity in three dimensions and a signed scalar in planar problems, and is related to angular momentum and rotational work.
What it is for: Not applicable; a physical quantity.
It can be explain the concept; relay formulas and units; describe applications; distinguish from related quantities.
Distinguishing features
Lever arm dependence
Vector or signed scalar
Same units as energy but distinct
Engineering measure
What it looks like
Not a visible object; a twisting effect.
Physical character
SI unit: newton metre unit - N m
formula: tau = r x F formula
rotational Newton law: tau = I alpha formula
How it is recognised
Rotational effect of a force
Torque, moment of force, engine torque, effective torque
Force causes linear acceleration; energy has the same units but is a scalar; moment of inertia is the rotational mass
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is a kind of - in registry terms, in planar problems
changes - as its time derivative
In practice
Families and kinds
torque as moment of force in mechanics
engine and motor torque
effective and rated torque in machines
tightening torque for fasteners
torque in electromagnetism and biomechanics
Identifiers
ISO 80000-4 moment of force mechanics quantities
Standards and regulation
ISO 80000 quantities and units
Fastener tightening torque standards
Engine torque measurement standards such as SAE J1349
Failure modes and hazards
Confusing torque with energy because of shared units
Over-tightening fasteners
Sign and axis errors
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What torque is.
Science.
Definition
Definition.
Definition
Definition.
- What is torque, and how do lever arm, force and axis determine it? definition
- Is the question about torque, force, energy or moment of inertia? boundary
Vector
Vector nature.
Vector
Vector.
- Why is torque a vector in three dimensions and a signed scalar in the plane, and how is its direction found? definition
- Which entry fits cross product? action
Compute Calculation and measurement.
Practice.
Formulas
Formulas.
Formulas
Formulas.
- How are torque, rotational work, power and angular acceleration related? action
- Which references are standard? provenance
Measurement
Measurement.
Measurement
Measurement.
- How is torque measured with torque wrenches, dynamometers and sensors? provenance
- Which entry fits torque wrench? action
Apply Applications.
Application.
Engines
Engine torque.
Engines
Engines.
- What does engine torque mean, how does it relate to power, and how is it rated? provenance
- Which sources are cited? provenance
Engineering
Engineering uses.
Engineering
Engineering.
- How is torque used in fastening, gearing, robotics and biomechanics? provenance
- Which entry fits the specific application? action
Context History and teaching.
Context.
History
History.
History
History.
- How did the concept develop from Archimedes lever to modern mechanics? provenance
- Which entry fits the history of mechanics? action
Teaching
Teaching.
Teaching
Teaching.
- How is torque taught, and what misconceptions arise? provenance
- Which entry fits physics education? action
What the second pass must settle
- Should engine torque and torque wrench be separate entries?
- How should physics and engineering references be linked?
- How should the moment of force naming be recorded?