WeSolve+ is best for converting problem heavy chapters into mixed practice, and this guide covers what actually deserves a card in physics, the sign convention layer everyone loses marks on, and where cards end and problem practice begins.
WeSolve+ reads the whole document and writes the questions for you
Upload your PDF, photograph your notebook, or point the camera. WeSolve+ writes questions from that material, explains why each answer is right, reads the chapter back to you as a podcast, and remembers every item you missed until you own it.
The tool below is a small browser-only tool and it is not WeSolve+: paste a few lines and text rules turn them into cards on the spot. The real app, the one that uses AI, is behind the link above.
Paste physics notes, get cards
This is a browser-only tool, and that is all it isIt splits the text you paste by rule, and nothing else. WeSolve+ is a different thing entirely: it reads your whole PDF with AI, writes the reasoning behind every question, speaks the chapter back to you, and remembers what you missed so it can return it. Try the real app now, free!
This browser tool uses text rules, not AI: definition lines become cards, others become fill in the blank. The app reads whole PDFs and photographed problem sets, and its cards carry reasoning.
The validity card: physics's most valuable pattern
Every law carries a license: momentum conservation needs zero net external force, mechanical energy conservation needs no friction, the kinematic equations need constant acceleration. Card the license, front asks when the law applies, back states the condition, because exams are built from situations where a familiar law almost applies. The student with validity cards recognises the trap; the student with formula cards walks into it holding the right equation.
Units and dimensions: the easiest marks in the subject
A joule is a newton metre; a watt is a joule per second; a newton is a kilogram metre per second squared. Unit cards are small, unambiguous and directly graded, and dimension checking, does this answer even have the units of energy, catches algebra errors nothing else catches. Card every quantity with its unit as the course introduces it, and the habit of checking dimensions rides along free.
Signs and directions: the quiet mark loss
Physics grades directions: the negative in a deceleration, the convention that work done against a field is positive or negative depending on whose bookkeeping, the third law pair acting on different bodies. These convention facts card cleanly, front poses the situation, back states the sign and why, and they repay carding because convention errors are invisible to the student making them: the algebra looks right while the physics is backwards.
The trap: mistaking cards for problem practice
Cards hold facts, conditions, units, conventions; they cannot rehearse the multi step judgment of an actual problem, and a deck full of solved problems is the pathway stuffing mistake again. The honest division of labor: cards keep the toolbox sharp, problem sets, built from your own chapter through PDF to quiz, train the choosing. Physics needs both and confuses them at its peril.
Concept contrasts: the pairs exams keep probing
Mass against weight, velocity against acceleration, energy against power, elastic against inelastic: physics exams return to the same contrast pairs because each hides a common misconception. Card them as one line contrasts, front names the pair, back gives each side one clause, and add the giveaway question each pair invites, can acceleration be nonzero at zero velocity? Yes, at a turning point. These cards convert classic traps into routine points.
Where this sits in WeSolve+
Chapter PDFs become mixed sets, cards for the toolbox, questions for the judgment, with reasoning attached to both; photographed formula sheets fold in through photo conversion, and the schedule keeps conventions warm. Exam bound: the AP Physics 1 page and unit pages carry the exam's own shape. Siblings: chemistry, biology, and the index.
Sources used on this page
- Physics
- Momentum
- Conservation law
- Kinematics
- Joule
- Dimensional analysis
- Newton's laws of motion
- Sign convention
- Acceleration
- Mass
- Weight
- Kinetic energy
- Friction
- Scalar (physics)
- Euclidean vector
- Physics education
- Flashcard
- Spaced repetition
- Testing effect
- Active recall
- Forgetting curve
- Leitner system
- Desirable difficulty
- Distributed practice
- Metacognition
- Study skills
- Retrieval-induced forgetting
- Long-term memory
| Pattern | Front | Back |
|---|---|---|
| Validity | When is momentum conserved? | Net external force zero |
| Unit | The joule, in base terms? | Newton times metre |
| Sign convention | Negative acceleration means? | Change opposes chosen positive |
| Contrast pair | Mass vs weight, one line each | Amount of matter; the force on it |
| Trap question | Nonzero acceleration at zero velocity? | Yes: turning points |
| Scalar or vector | Kinetic energy's character? | Scalar, never negative |
Should physics formulas go on flashcards?
With their license: card when the law applies, its units and its signs. Bare symbol cards train recognition of the wrong thing.
What is a validity card?
Front asks when a law applies, back states the condition: momentum needs zero net external force, energy conservation needs no friction.
Why card units separately?
They are small, unambiguous, directly graded, and dimension checking catches algebra errors nothing else sees.
Can cards replace problem sets?
No: cards keep the toolbox sharp, problems train the choosing. A deck of solved problems is the stuffing trap in physics costume.
What are contrast pair cards?
One line contrasts of the pairs exams probe: mass and weight, velocity and acceleration, each with its giveaway trap question.
Does this connect to AP Physics prep?
Yes: AP Physics 1 and 2 pages with their unit pages pair with sets built from your own course PDF.
Last updated: 2026-08-15