Use the same approach for conceptual explanations, equations, graphs, and practice problems: identify what is known, what is being asked, and what relationships actually apply. A polished derivation cannot repair an assumption that the problem never supplied.
Separate the physical setup from the arithmetic
For a mechanics problem, identify the object, reference direction, relevant interval, and whether acceleration is assumed constant. For an electrical problem, identify the circuit connections and stated component model. For a graph, supply axis labels and units as well as the curve.
If a diagram contains a label you cannot read, transcribe the legible quantities and leave the unclear one unresolved. Asking ChatGPT to restate the setup first gives you a chance to catch a misread distance or a force assigned to the wrong object.
OpenAI's prompting guidance, checked October 24, 2026, recommends giving the context that changes the answer and defining the desired output. For physics, request symbolic relationships and assumptions before substituted numbers.
Check an average that looks too easy
Consider this original paper problem. A traveler goes 60 km east at a constant 30 km/h, then 60 km west at a constant 60 km/h. Ignore any time needed to turn around. What are the average speed and average velocity over the whole trip?
The leg times differ:
| Leg | Distance | Time |
|---|---|---|
| Eastbound | 60 km | 60 / 30 = 2 h |
| Westbound | 60 km | 60 / 60 = 1 h |
Total distance is 120 km and elapsed time is 3 h, so the average speed is 40 km/h. The traveler returns to the starting point, so displacement is zero and average velocity over the full interval is 0 km/h.
The arithmetic mean of the two leg speeds is 45 km/h. That would apply to equal amounts of time at the two speeds, which this problem does not have. Equal distances and equal times are different conditions.
OpenStax distinguishes average speed from average velocity: the former uses distance and the latter uses displacement, both over the relevant elapsed time. The trip and numbers above are an independently authored worked example, not a travel record or a ChatGPT transcript.
Use a request that exposes the choice of equation
Help me understand this physics problem at [COURSE LEVEL].
Exact problem: [PASTE]
Diagram labels and units: [TRANSCRIBE]
My setup and the step I cannot justify: [PASTE]
First restate the known quantities and requested quantity. Name
the physical model, direction convention and assumptions needed.
Do not add missing measurements. If the problem is ambiguous,
ask a question or show the conditional alternatives.
Explain why the equation applies before substituting numbers.
Keep units in the calculation and distinguish signed quantities
from magnitudes. Check the result with a limiting case or an
independent relation. Identify any part you cannot verify.
For a concept question, replace the calculation request with a request for a concrete example and a counterexample. For a graph, ask what the slope or area represents for those particular axes; the same-looking line can encode different quantities when the axis labels change.
Challenge the result with the original conditions
For the trip, the full-interval average velocity is zero even though the traveler moves during both legs. That does not mean the instantaneous velocity was zero throughout. A proposed explanation that makes that leap confuses the interval summary with motion at each instant.
Change one condition mentally: if the traveler stayed eastbound for the second leg, total distance and time would remain the same, but displacement would be 120 km east. The average speed would stay 40 km/h and average velocity would become 40 km/h east. This is a check of which quantity depends on the direction.
If you need guided practice rather than a complete solution, ask Study mode for one step at a time. Keep your own diagram and derivation in the course's required format. When a step remains disputed, bring that exact assumption or equation to the instructor rather than asking for repeated full solutions until one looks convincing.