STEM REASONING AND EVIDENCE WORKBENCH
Compare paired signed interaction forces with a declared tolerance and audit equal-magnitude, opposite-direction claims.
Review output
Load the worked example to inspect realistic inputs, or enter anonymous classroom or laboratory evidence. Results remain in this browser tab until you copy or download them.
Transparent method
For one declared axis, an ideal interaction pair satisfies F on A by B equals negative F on B by A. The engine calculates signed residual F1 plus F2 and absolute magnitude difference. Both must be at or below the entered force tolerance before the pair is classified as equal and opposite. A supported row means the learner claim agrees with this paired measurement model. It does not mean the two forces cancel on either object or that either object has zero acceleration. Inspect timing, axes, sensor zero, system boundaries, uncertainty, and free-body diagrams before accepting the physical explanation.
Confirm the question, approved source, units, notation, signs, response coding, model assumptions, and review threshold. Keep an unchanged copy of measurements or learner evidence.
Run the worked example, inspect every intermediate row, and compare the result with a hand calculation, diagram, representation, periodic table, or approved laboratory method.
Record the method, assumptions, uncertainty, units, classifications, and flagged rows. Verify the editable report independently before instruction, assessment, or laboratory use.
How to interpret the result
Use for dual-sensor or paired-observation investigations where learners must identify forces acting on different objects. It distinguishes an interaction pair from balanced forces on one object. It does not identify missing forces, calculate acceleration, synchronize sensors, correct offsets, infer contact direction, or certify an apparatus.
The cart and foot-ground pairs have equal magnitudes and opposite signs. The magnet readings differ by only 0.05 N, which is inside the entered 0.1 N tolerance. The final forces point in the same signed direction, so a learner yes claim conflicts even though their magnitudes match.
For one declared axis, an ideal interaction pair satisfies F on A by B equals negative F on B by A. The engine calculates signed residual F1 plus F2 and absolute magnitude difference. Both must be at or below the entered force tolerance before the pair is classified as equal and opposite.
A supported row means the learner claim agrees with this paired measurement model. It does not mean the two forces cancel on either object or that either object has zero acceleration. Inspect timing, axes, sensor zero, system boundaries, uncertainty, and free-body diagrams before accepting the physical explanation.
Do not place both forces on one free-body diagram, pair weight with normal force automatically, compare measurements from different times, ignore axis direction, use unequal units, or claim equal forces produce equal motion. Name both objects and both force directions, synchronize evidence, and separate interaction pairs from equilibrium.
Learning boundary
This browser-local workbench applies only the disclosed rules. It cannot diagnose a learner, certify an experiment, establish a chemical structure, or replace teacher, laboratory, and safety judgment.
Review checklist
Practical questions
No. Processing occurs in the current browser tab. Avoid personal information and retain authoritative records only in the school-approved system.
No. It describes entered evidence under one disclosed rule. Compare several evidence sources and ask for reasoning before drawing a conclusion.
Treat it as an editable calculation aid. Show your own reasoning, cite required sources, and follow the course method and academic-integrity rules.
YOUR NIRMION
