Hooke's Law Spring Force Calculator

Inspectable records

Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

Area

Physics — Kinematics/Projectiles/Orbits, Forces/Energy/Momentum, Rotational Dynamics, Gravitation, Oscillations/Waves, Optics, E&M Fields, Relativity, Quantum, Statistical Thermo

Tranche

tranche-4

Evidence ID

t4-283

Ledger rows

1

No ledger note is attached.

Review findings

The formula is the standard one-dimensional Hooke's-law restoring-force relation. Verdict is NEEDS_REVIEW because the input specification does not explicitly define x as displacement from equilibrium or state the required units and unit-conversion behavior.

Formula and scope findings

No additional record

Unit assumptions

• F=−kx is valid when x is displacement from the spring's unstretched or equilibrium position, as appropriate to the stated model; the reference position must be defined.
• k must be positive and expressed in force per length, conventionally N/m.
• x must be expressed in a compatible length unit, conventionally meters; the spec does not state whether the calculator performs unit conversion.
• F is returned in the corresponding force unit, conventionally newtons.
• The negative sign indicates that the restoring force opposes the signed displacement.

Boundary hardening

BREAK_CLAIMED · SELF_FLAGGED

A finite extreme input, k = 1e308 and x = 1e308, produces -Infinity in plain JavaScript arithmetic instead of a finite force. The specification also leaves the sign convention for x ambiguous, which can reverse the reported force direction.

Errata and corrections

No applied erratum is attached to this unique-name record.

Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

{
  "inputs": {
    "k": 200,
    "k_unit": "N/m",
    "x": 0.015,
    "x_unit": "m"
  },
  "expected_outputs": {
    "F": -3,
    "F_unit": "N"
  },
  "working": "F = −kx\nF = −(200 N/m)(0.015 m)\nF = −3 N"
}

Related workflows

No source-defined multi-instrument workflow membership is recorded.

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json · VERIFIED_CLEAN
• evidence-tranche4/tranche4-results.json
• BOUNDARY_HAZARD_CATALOG.json