AP Physics 1 FRQ Guide: 5 Questions in 90 Minutes, Derivation and Reasoning Earn Points

Free response questions account for 50% of your AP Physics 1 exam score. Section II presents five questions over 90 minutes. Each is graded on a rubric that rewards clear algebraic derivation, physical reasoning in words, correct use of units, and justified problem-solving approaches.

What Are AP Physics 1 FRQs?

AP Physics 1 FRQs test your ability to translate between words and math, apply physics principles to novel scenarios, and communicate physical reasoning. The rubric is explicit: a final numerical answer without derivation earns zero points, even if correct.

The Five Common FRQ Types

Experimental Design: Describe how to design an experiment, identify variables, and address error. Explain which variables are controlled and why.

Qualitative/Quantitative Translation: Create diagrams, write equations, or predict changes from verbal descriptions.

Paragraph-Length Response: Explain physical reasoning. State the relationship, explain why it holds, connect to the scenario.

Short-Answer Calculations: Calculate quantities, justify your approach, show algebraic derivation.

Free-Body Diagram and Force Analysis: Draw diagrams, analyze forces, calculate accelerations or tensions. Include all forces, draw to scale, label with variables.

Key Strategies for Maximum Points

Draw Free-Body Diagrams: Before writing equations, draw forces. Label every force. Draw axes.

Show Algebraic Derivation: Write formula, substitute variables, solve algebraically, then plug in numbers.

Explain Physical Reasoning: Don't describe motion; explain the physics principle causing it.

Use Units Consistently: Write units with every quantity. Check dimensional consistency.

Define Variables: State what each variable represents before writing equations.

Connect to the Scenario: Restate your answer in context of the original problem.

Five Mistakes That Cost the Most Points

Not Drawing Free-Body Diagrams: Takes one minute, earns a point on nearly every mechanics problem.

Showing Only Final Answers: No derivation = zero points, even if correct.

Confusing Energy vs. Force Methods: Recognize which applies and justify your choice.

Not Checking Units and Physical Sense: Verify magnitude, direction, and units are reasonable.

Not Justifying Your Approach: Explain why you chose energy conservation over kinematics or vice versa.

How to Practice Effectively

Use released FRQs from collegeboard.org. Allow 12–15 minutes per question. Compare to the official rubric. Practice at least one full Section II every three days before the exam.

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