simple machine
Enable an AI agent to recognise a simple machine, assess how it transmits force and motion, and determine whether a proposed use is mechanically feasible and safe.
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.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an AI agent to recognise a simple machine, assess how it transmits force and motion, and determine whether a proposed use is mechanically feasible and safe.
A simple machine is an elementary mechanical device that changes the magnitude or direction of an applied force through its geometry, exchanging force for displacement without increasing the available mechanical work.
It can be Classify an observed arrangement by tracing effort, load, support, and permitted motion.; Estimate ideal effort and travel requirements from a stated configuration.; Compare measured performance with ideal predictions to identify losses or configuration errors.; Assess whether a load can backdrive the mechanism or requires independent restraint.; Identify inspection and maintenance needs at pivots, threads, grooves, edges, and supporting contacts.; Determine whether available evidence supports a proposed load and configuration or requires further verification..
Distinguishing features
An arrangement must have identifiable effort and load interactions connected by geometry and constraints; merely being a rigid object does not establish a simple-machine role.
Its elementary operating principle must be describable through a conventional simple-machine family; commercial simplicity or few parts alone is insufficient.
It redirects force or exchanges force or torque against displacement or rotation without supplying energy independently.
A complete device containing several coordinated elementary mechanisms is assessed as a compound machine, while its constituent simple-machine roles remain identifiable.
Classification depends on use and configuration: the same bar can serve as a lever when supported at a fulcrum or remain an unconfigured structural member.
Scope
+ The six conventional simple-machine families and the physical arrangements that instantiate them
+ Effort, load, support, contact, and motion relationships
+ Mechanical advantage, displacement trade-offs, work transfer, and frictional losses
+ Configuration-dependent operating limits and mechanical condition
+ Use as an elementary mechanism within a larger machine
- Complete compound machines and coordination between their constituent mechanisms
- Motors, engines, and other sources of input energy
- Product ranges, manufacturer catalogues, and individual asset administration
- Detailed structural design and material constitutive models
- Application-specific lifting, transport, or manufacturing procedures
Characteristics
- Simple-machine family
- lever | wheel-and-axle | pulley | inclined-plane | wedge | screw; multiple roles may be recorded Selects the relevant geometry, motion constraints, and performance relationships.
- Effort-load-support arrangement
- Identified input, output, fulcrum or support, contacts, and force directions Makes classification and force analysis depend on the actual configuration.
- Effective geometry
- Perpendicular moment arms, radii, travel lengths, rise, and screw lead in m; angles in degrees or rad Determines the ideal relationship between input and output motion and effort.
- Input effort and output resistance
- Force in N or torque in N·m, with direction and operating condition Distinguishes the required effort from the load and supports comparison with operating limits.
- Motion ratio
- Input travel/output travel, dimensionless for matched motion types; m/revolution for rotary-to-linear motion Exposes the displacement cost of force multiplication.
- Mechanical advantage
- Dimensionless output-force/input-force ratio with measurement points and ideal or actual basis stated Prevents an ambiguous advantage value from being used across different configurations or motion types.
- Energy-transfer efficiency
- Useful output work/input work, dimensionless or %, over a stated operation Separates ideal geometric predictions from friction and other losses.
- Backdriving behaviour
- backdrivable | holds under specified conditions | separately restrained | unassessed Determines whether removing effort can allow the load to move.
- Condition of load-bearing interfaces
- serviceable | worn | deformed | cracked | seized | loose | unassessed, with affected interface Connects observable condition to loss of support, altered motion, or failure.
- Verified operating envelope
- Configuration linked to documented force or torque limits, travel limits, support requirements, and evidence Prevents geometry-based calculations from being mistaken for proof of load capacity.
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: 6 bundles · 11 layers · 16 findings · 26 questions.
Identity and mechanism boundary Establishes which simple-machine role an arrangement performs and where that role begins and ends.
Simple-machine identity depends on mechanical relationships rather than appearance, product name, or part count.
Family recognition
Connects observable constraints and motion to the conventional families.
Operating role
Record the family assignment through the arrangement's force and motion relationships, allowing overlapping roles when justified.
- Which of the six conventional families describes the arrangement, and what observed motion or constraint supports that assignment? definition
- Does the same component perform different simple-machine roles in different uses or configurations? boundary
Elementary versus compound
Separates an elementary mechanical role from the larger equipment containing it.
Mechanism boundary
Identify the contacts, supports, and elements needed for the elementary action without absorbing the complete host machine.
- Which components and external supports are necessary to define this simple-machine action? boundary
- Which additional mechanisms or energy sources belong to the host machine rather than this elementary role? boundary
Geometry and motion Captures the geometry and constraints that connect effort movement to load movement.
The governing measurements differ substantially between rotating mechanisms and inclined or helical contacts.
Rotation and flexible transmission
Describes lever arms, coupled radii, and pulley routing.
Effective arms and routing
Use perpendicular moment arms, effective radii, and actual rope geometry rather than nominal component dimensions alone.
- For a lever or wheel and axle, what are the effective moment arms or radii at the stated force directions? measurement
- For a pulley arrangement, which segments support the moving load, at what angles, and how does routing constrain input and output travel? measurement
Inclined and helical contact
Describes motion conversion through slopes, wedge faces, and threads.
Contact geometry
Record the active contact geometry and movement direction, including screw lead rather than assuming thread pitch equals advance per revolution.
- What slope length and rise, wedge-face angles, or screw lead govern the actual input and output movement? measurement
- Which body moves, which surfaces constrain it, and where do contact or travel limits terminate the motion? boundary
Effort, work, and losses Relates ideal geometric performance to measured force, torque, travel, and energy transfer.
A simple machine can multiply force without multiplying energy, and actual effort depends on losses and operating conditions.
Ideal transfer
States the assumptions and quantities used for an ideal performance estimate.
Force and travel trade-off
Pair every claimed force advantage with the associated displacement relationship and explicit idealisation.
- Under the stated frictionless and motion assumptions, what input effort and travel are required for the specified load movement? measurement
- Are the input and output both forces, both torques, or different quantities requiring a clearly defined conversion relationship? definition
Actual performance
Accounts for measured losses and differences between starting and sustained movement.
Losses and test basis
Associate actual performance with frictional contacts, deformation, speed, and a reproducible measurement basis.
- How do measured starting effort, running effort, and useful output work compare with the ideal prediction? measurement
- What test or source supports the efficiency estimate, and which contact, lubrication, load, and speed conditions does it cover? provenance
Load holding and integrity Assesses whether the arrangement remains supported and controlled under load.
Mechanical advantage alone establishes neither strength nor the ability to hold a load when effort ceases.
Backdrive and restraint
Distinguishes motion resistance from demonstrated load holding.
Release of effort
Determine what happens when input effort is removed, reduced, or reversed under the relevant contact conditions.
- Will the specified load descend, unwind, eject the wedge, or otherwise reverse the mechanism when effort is removed? measurement
- What restraint or verified holding condition is required before releasing input effort or approaching the load? action
Load-path condition
Connects support integrity and local defects to configuration-specific limits.
Capacity and defects
Record evidence for capacity and inspect the interfaces whose failure would interrupt the load path.
- What documentation or assessment establishes the allowable load for the fulcrum, axle, rope, thread, contact surface, and anchorage actually used? provenance
- Which observed wear, cracking, thread damage, rope damage, slipping support, or deformation requires withdrawal or reassessment? action
Configuration and intervention Guides setup, adjustment, and maintenance of the elementary mechanism.
Changing a fulcrum, reeving path, contact surface, or thread condition can change both useful performance and hazards.
Setup and use
Checks that the chosen configuration can deliver the intended motion within its supported operating envelope.
Configuration check
Evaluate effort access, available travel, stable support, and load control before operation.
- Does the selected geometry provide sufficient output travel with available input effort and movement space? measurement
- What setup changes are needed to prevent support movement, rope derailment, contact separation, or entry into pinch and crush zones? action
Maintenance and reassessment
Identifies interventions that preserve function or require renewed performance and holding checks.
Contact-changing interventions
Treat lubrication, replacement, alignment, and geometry changes as interventions that may alter friction, advantage, or load retention.
- Which pivots, bearings, threads, ropes, and contact faces require inspection or maintenance under the applicable usage instructions? action
- After lubrication, replacement, or reconfiguration, which effort, travel, support, and backdriving properties must be checked again? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This describes the classical mechanics category, not a particular product or physical unit; the six types are a conventional classification and are not all mechanically independent.
- Dimensions, load capacities, power sources, controls and applicable standards depend on the actual implementation and cannot be assigned universally.
- Ideal mechanical advantage assumes lossless operation; practical performance also depends on friction, deformation and operating conditions.
- Which of these check these first hold for the sense of simple machine this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Lever
- Wheel and axle
- Pulley
- Inclined plane
- Wedge
- Screw
- Which of these kinds and varieties hold for the sense of simple machine this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Levers lift or pry loads about a fulcrum.
- Wheel-and-axle arrangements transmit torque and provide mechanical advantage in devices such as hand winches.
- Pulley arrangements redirect pulling forces or reduce the effort required to lift loads.
- Inclined planes let loads reach a different elevation over a longer travel distance.
- Wedges split or separate materials, while screws convert rotation into axial motion or clamping force.
- Which of these real-world use hold for the sense of simple machine this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Mechanical advantage - No universal range; the ratio of output load force to input effort force can be below, equal to, or above 1. - dimensionless
- Mechanical efficiency - 100% in the ideal lossless model; less than 100% in real operation with friction or other losses. - %
- Which of these typical measurements hold for the sense of simple machine this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Overloading can bend, buckle or fracture load-bearing components.
- Sliding loads, slipping contact surfaces or displaced supports can cause sudden loss of control.
- Moving parts and closing gaps can create pinch, crush or entanglement hazards.
- Friction and wear can increase required effort and degrade operation.
- An unsupported load can drive a reversible mechanism backward and fall or move unexpectedly.
- Which of these failure modes and hazards hold for the sense of simple machine this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Compound machine - Combines two or more simple machines into an operating assembly.
- Mechanism - A broader category of arrangements that constrain or transmit motion and forces; it need not belong to one of the six classical simple-machine types.
- Engine - Converts an energy source into mechanical work; a simple machine transmits and transforms mechanical input.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of simple machine this model covers, and on what evidence? provenance
What the second pass must settle
- Does an existing Vercy world model already own the simple-machine concept, requiring this registry entry to link to it?
- Which authoritative sources should anchor the six-family classification and resolve overlapping classifications such as a wedge acting as a moving inclined plane?
- Where should this catalogue draw the boundary between a pulley arrangement modelled under simple machine and a compound lifting mechanism?
- Which application-specific standards and issuing bodies apply to particular implementations, and which requirements belong in neighbouring equipment models?
- What evidence is sufficient to record load capacity or self-locking behaviour when an arrangement has no manufacturer rating or documented test?