Description
Assistive-tool bench lever arithmetic with supplied efficiency.
Activity and assistive-task records distinguish planned, attempted, completed, assisted, observed, and optional components. Shares depend on the selected denominator and credit policy. A supplied code, geometry, or time-budget calculation is separate from evaluating an individual's function or safe access.
Assistive-tool bench lever arithmetic with supplied efficiency.
When to use this tool
Use Assistive Tool Lever Arm Mechanical Advantage when you need this specific task-count, assistance-code, timing, equipment-budget, or participation-record component.
How to use the tool and how it works
- Enter effortArm, loadArm, efficiency, inputForce. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read idealAdvantage, effectiveAdvantage, outputForce. Use the output convention below.
For positive effortArm and loadArm, nonnegative inputForce, and efficiency in [0,1] return idealAdvantage=effortArm/loadArm, effectiveAdvantage=ideal*efficiency, and outputForce=inputForce*effectiveAdvantage.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| effortArm | Effort Arm | Required. Finite number; strictly above 0. |
| loadArm | Load Arm | Required. Finite number; strictly above 0. |
| efficiency | Efficiency | Required. Finite number; minimum 0; maximum 1. |
| inputForce | Input Force | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| idealAdvantage | Ideal Advantage | Required. Finite number. |
| effectiveAdvantage | Effective Advantage | Required. Finite number. |
| outputForce | Output Force | Required. Finite number. |
{
"input": {
"effortArm": 20,
"loadArm": 5,
"efficiency": 0.8,
"inputForce": 10
},
"output": {
"idealAdvantage": 4,
"effectiveAdvantage": 3.2,
"outputForce": 32
}
}Limitations and assumptions
- Arms are perpendicular moment-arm lengths in one unit and efficiency is dimensionless. The ideal lever relation does not check geometry through motion, device strength, user capability, or safe assistive use.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the intended assessment and a complete task or access model when a local check is insufficient. Verify task definitions, credit policies, measurement units, and the context of the underlying observations.
References
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