How do I solve AP Physics free response questions?

Free Response Questions are where most students lose points on the AP Physics 1 exam - not because they don't know the physics, but because they don't know how to present their answers in the way that earns credit.

The AP exam uses criterion-based scoring. Each FRQ is broken into parts, and each part has specific criteria the grader looks for. Hit the criteria, you get the point. Miss them, and even correct physics reasoning might not get credit.

The four FRQ types

Question type	What it tests	Key skill
Mathematical routines	Deriving and calculating	Start from a fundamental principle, show every step
Translations between representations	Moving between diagrams, graphs, and equations	Connect visual and mathematical representations
Experimental design and analysis	Setting up experiments and interpreting data	Describe procedure, variables, and analysis
Qualitative/quantitative translation	Explaining physics reasoning with and without math	Justify your claims with principles, not just numbers

Your AP test will have one question of each type, so you need to be comfortable with all four.

How to approach any FRQ

• Read the entire question first. Many FRQs have parts that connect to each other. Understanding the full scope before you start prevents you from going down the wrong path in part (a).
• Show your reasoning, not just your answer. Start from a fundamental principle (like Newton's second law or conservation of energy), state it explicitly, and show each step.
• Label everything. Units on your answers. Labels on your graph axes. Variable definitions when you introduce them. Points are lost to missing labels more often than to wrong physics.
• Practice under timed conditions. You get about 25 minutes per FRQ on test day. If you've never practiced with a timer, your first timed attempt shouldn't be the real exam.

See our FAQ on common AP exam mistakes for more on what to watch out for.

How PhysicsGraph prepares you

At PhysicsGraph, we have dozens of FRQs covering all four question types and all AP Science Practices, with AI grading that gives you point-by-point feedback within minutes. We also include FRQs in our practice exams so you can practice under real test conditions.