Mistake Master

AP Physics C: Mechanics Practice

Three modes of free AP Physics C: Mechanics practice, each built around a different question: where am I weak, can I fix one specific weakness, and can I put it all together under exam conditions. No account needed. Progress saves locally in your browser.

Mode 01

Diagnostic

Short topic-level assessments that pinpoint which specific misconceptions are costing you points. Each item is mapped to a published research finding about how students get physics wrong.

  • ~10 items per topic
  • Per-misconception scoring
  • Sends you to targeted drills next
Start a diagnostic

Mode 02

Targeted drills

Once a diagnostic flags a misconception, drills hit only that one concept repeatedly with varied scenarios until you stop falling for it. The fastest path from a 3 to a 4.

  • One misconception at a time
  • Multiple-choice format
  • Reached from your diagnostic result

Mode 03

Cumulative MCQ

Full-unit 20-item multiple-choice exams that mirror AP Physics C: Mechanics format and difficulty. Best as a final check after lessons and drills, or as a baseline before a unit test.

  • 20 questions per unit
  • Mixed-misconception, exam-style
  • Score-history tracking
Take a cumulative

Practice by unit

Seven units, AP Physics C: Mechanics framework

  1. Unit 1KinematicsPractice ›
  2. Unit 2Force and Translational DynamicsPractice ›
  3. Unit 3Work, Energy, and PowerPractice ›
  4. Unit 4Linear MomentumPractice ›
  5. Unit 5Torque and Rotational DynamicsPractice ›
  6. Unit 6Energy and Momentum of Rotating SystemsPractice ›
  7. Unit 7OscillationsPractice ›

Why misconception-targeted practice works

Most AP Physics C: Mechanics problems aren't hard because the calculus is hard. They're hard because they're engineered to trip students into a specific wrong way of thinking. Centripetal force is not a separate physical force. Work can be negative, and the sign matters in the work-energy theorem. The rotational analog of Newton's second law needs the right moment of inertia for the axis in question. If you don't hold the misconception, the problem is straightforward. If you do, no amount of additional practice will help unless that specific misconception is the one being addressed.

That is why Mistake Master is built around diagnose then drill rather than around problem volume. Working 200 practice problems with a misconception intact rebuilds the misconception 200 more times. Working 20 drill problems that explicitly target the misconception, with feedback after each, rewires it.

Common questions

FAQ

Is Mistake Master free?

Yes. Every diagnostic, drill, and cumulative exam is free. No account required. Your progress saves in your browser using local storage.

How many practice problems are available?

Several hundred items across the active units. Each topic has a topic-level diagnostic (about 10 items), per-misconception drills (variable item counts depending on the misconception), and a unit-level cumulative MCQ exam (20 items per unit).

Where should I start?

If you have a unit test coming up, take the cumulative MCQ for that unit cold to see where you stand. If you are early in the year or studying for the AP exam, run topic diagnostics for the units you have covered and let the results route you to drills.

Is this aligned to the College Board framework?

Yes. Items are anchored to the published AP Physics C: Mechanics Course and Exam Description (essential knowledge statements), with internal misconception codes that map onto the most-cited findings in physics education research.

How long does a practice session take?

A topic diagnostic takes 10 to 15 minutes. A single drill takes 5 to 10 minutes. A full cumulative exam takes about 30 to 40 minutes.