AP Physics 1 FRQ Guide 2026 — Free Response Tips, Format & Scoring
The AP Physics 1 free response section is worth 50% of your total score. It has 5 questions totaling 60 raw points. Here's the full breakdown and how to maximize your score.
AP Physics 1 FRQ Format
| FRQ | Points | Time (approx) |
|---|---|---|
| FRQ 1 | 12 pts | ~22 min |
| FRQ 2 | 12 pts | ~22 min |
| FRQ 3 | 12 pts | ~22 min |
| FRQ 4 | 12 pts | ~22 min |
| FRQ 5 — Experimental Design | 12 pts | ~22 min |
| Total | 60 pts | 110 min |
The 60 FRQ points scale to 75 composite points (50% of 150).
The 5 FRQ Types
FRQs 1–4: Standard Multi-Part Questions
Each standard FRQ has 3–5 sub-parts and tests different physics skills:
- Quantitative analysis: Solve for a quantity using equations; derive an expression algebraically
- Qualitative reasoning: Explain why something happens using physics principles (no numbers)
- Representation: Draw a free body diagram, energy bar chart, or motion graph
- Argumentation: Claim + evidence + reasoning for why a physical model applies
FRQ 5: Experimental Design
FRQ 5 always tests your ability to design and analyze an experiment. You must:
- Identify what to measure and what tools to use
- Describe a procedure to collect data
- Explain how you'd use the data to find a quantity (often involves graphing)
- Identify sources of experimental error
How AP Physics 1 FRQs Are Scored
Each FRQ is scored point-by-point. Every point has a specific criterion.
Critical rules:
- Show every step. A correct final answer with no work earns 0 on calculation questions.
- Diagrams must be labeled. Force arrows without labels (magnitude or direction) don't earn points.
- Units matter. A numerical answer without correct units typically loses the unit point.
- Contradictions negate. If you write something correct then contradict it, the correct statement is negated.
Claim-Evidence-Reasoning (CER) Format
AP Physics 1 FRQs frequently ask you to "justify," "explain," or "support your answer." The expected format is Claim-Evidence-Reasoning (CER):
- Claim: Your answer to the question
- Evidence: A physics principle, law, or equation that applies
- Reasoning: How the evidence leads to your claim in this specific situation
Example prompt: "A student claims doubling the mass of a pendulum will halve its period. Do you agree? Justify your answer."
❌ Weak answer: "No, the period doesn't depend on mass."
✓ Strong answer (CER): "No, the period will remain the same. [Claim] The period of a simple pendulum is given by T = 2π√(L/g), which depends only on length and gravitational acceleration — not mass. [Evidence] Therefore, doubling the mass changes neither L nor g, and the period is unchanged. [Reasoning]"
Experimental Design FRQ — Earning All 12 Points
FRQ 5 follows a predictable structure. A full-credit response includes:
1. Variables (2 pts)
- State the independent variable (what you change)
- State the dependent variable (what you measure)
- State at least one controlled variable
2. Procedure (3 pts)
- Describe a step-by-step procedure
- Specify what equipment you use
- Include enough repetitions to reduce error
3. Data collection and analysis (4 pts)
- Explain what graph to make (usually: what goes on each axis)
- Explain what the slope (or intercept) represents physically
- Write the equation relating the variables
4. Error analysis (2 pts)
- Identify one source of experimental error (e.g., friction, air resistance, measurement uncertainty)
- Explain how it affects the result (does it increase or decrease the measured quantity?)
5. Claim (1 pt)
- State what your data would show if the hypothesis is correct
Most Common Mistakes on AP Physics 1 FRQs
1. Writing equations without identifying variables Writing "F = ma" earns 0 if you don't define what F, m, and a are in this specific problem.
2. Forgetting direction in force/motion problems Physics is a vector science. "The net force is 10 N" is incomplete. "The net force is 10 N directed downward" is correct.
3. Drawing free body diagrams wrong
- Draw arrows from the object's center (or surface for normal/friction)
- Label each force with its type (gravity, normal, tension, friction) — not just "F"
- Don't include velocity or acceleration as forces
4. Skipping qualitative reasoning questions Many students focus on calculation parts and skip "explain" or "describe" parts. These are often 2–3 points each and don't require math.
5. Not linearizing data for graphing If asked to make a graph that shows a linear relationship, use the equation to determine what to plot. For T = 2π√(L/g), plot T² vs. L (not T vs. L) to get a straight line.
Score Impact of FRQs
With compositeMax = 150:
| FRQ Raw Score | Composite pts | Combined with 32/45 MC, final score |
|---|---|---|
| 54/60 (90%) | ~67.5 pts | ~107/150 → 4–5 range |
| 42/60 (70%) | ~52.5 pts | ~92/150 → 4 |
| 30/60 (50%) | ~37.5 pts | ~77/150 → 3–4 |
AP Physics 1 has a low 5 rate (~7%) largely because FRQ performance is weak. Students who master the CER format and experimental design questions consistently score above average.