How to get a 5 on AP Physics 1

By Ashraf Bhura, Co-Founder, STEM-Tutor · Updated October 2026

A 5 on AP Physics 1 comes from understanding, not memorising. Here is what the exam rewards and a plan to get there.

Know what you are studying

AP Physics 1 is organised into eight units:

1. Kinematics
2. Force and Translational Dynamics
3. Work, Energy, and Power
4. Linear Momentum
5. Torque and Rotational Dynamics
6. Energy and Momentum of Rotating Systems
7. Oscillations
8. Fluids

Check the current course and exam description on AP Central for exam timings and weightings, as the College Board updates them.

What the exam rewards

• Choosing the right idea. Most questions are about deciding whether forces, energy or momentum is the right tool.
• Reasoning in words. Free-response questions ask you to justify answers, not just calculate them.
• Reading graphs and diagrams. Many questions give information as a graph, a table or a sketch.
• Experimental thinking. Expect questions about designing an experiment or analysing data.

Five habits of students who score a 5

1. They draw before they write. Free-body diagrams, energy bar charts and motion graphs come first.
2. They name the principle. "Momentum is conserved because there is no net external force" earns marks and prevents mistakes.
3. They practise free-response questions weekly, then mark them against official scoring guidelines.
4. They keep an error log and redo every missed question a week later.
5. They study rotation early. Units 5 and 6 feel hardest for most students, so they get extra time.

A simple plan for the year

• Through the school year: after each unit, do a set of mixed questions and two free-response questions.
• Two to three months before the exam: one timed section a week, alternating multiple choice and free response.
• The final month: full practice exams under real timing, then fix the weakest unit each week.

Common mistakes to avoid

• Hunting for a formula before deciding which principle applies.
• Writing a correct number with no justification on a question that asks why.
• Mixing up rotational and translational quantities.
• Leaving fluids until the end because it is the last unit.

A free-response answer, step by step

Question: A block is released from rest at the top of a frictionless 30° ramp of length 2 m. (a) Draw a free-body diagram. (b) Find its speed at the bottom. (c) Explain how the speed would change if the ramp were rough.

1. (a) Two forces: weight mg straight down and the normal force perpendicular to the ramp. No friction arrow, because the ramp is frictionless.
2. (b) Height dropped: h = 2 sin30° = 1 m. Energy is conserved: mgh = ½mv², so v = √(2 × 9.8 × 1) ≈ 4.4 m/s.
3. (c) "The speed at the bottom would be lower. Friction does negative work on the block, converting some mechanical energy into internal energy, so less kinetic energy is left at the bottom."

Each part earns separate marks: a correct diagram, a starting equation, a correct answer with units, and a reasoned explanation.

Practise experimental questions

The exam often asks you to design an experiment or analyse data. A strong design answer lists:

• What you will measure and with what equipment.
• What you will vary and what you will keep constant.
• How you will use the data, often by plotting a graph whose slope gives the quantity you want.

Example: to find g with a pendulum, measure the period T for several lengths L. Plot T² against L; the slope is 4π²/g, so g = 4π²/slope.

Your final-week checklist

• Do one full timed practice exam and mark it honestly.
• Re-read the equation sheet and know where every equation is.
• Review your error log, especially rotation and fluids.
• Sleep well the night before. Tired students misread questions.

Practice questions

Try each one before opening the answer.

The mindset that earns a 5

Students who score a 5 do not know more formulas than everyone else. They are better at three things: picking the right principle quickly, explaining their reasoning clearly, and checking whether answers make physical sense. All three can be trained with deliberate practice.

Train principle selection

Take a set of mixed problems and, for each one, write only the principle you would use and why, without solving. Then check. Ten minutes of this every week builds the most important exam skill.

Train explanations

For every free-response question you practise, write the explanation part in full sentences, then compare it with the scoring guidelines. Keep a list of phrases that earn marks, such as "the net external force on the system is zero, so momentum is conserved".

Train sense-checking

After each calculation, ask: is the size reasonable, are the units right, and does the direction make sense? A car accelerating at 500 m/s² or a ball falling at 300 m/s should immediately look wrong.

More practice

Try each one before opening the answer.

Frequently asked questions

How many practice exams should I take?

Two or three full timed practice exams in the final month is plenty, as long as you review every mistake carefully.

What score do I need on practice exams for a 5?

Score cut-offs change each year and are not published in advance. Aim to understand every question type rather than chasing a number.

Is it worth getting a tutor?

A tutor helps most when you understand the lessons but cannot solve problems alone, or when your written explanations keep losing marks.

Key takeaways

• Master choosing the right principle: forces, energy or momentum.
• Practise free-response questions weekly and mark them with the scoring guidelines.
• Write explanations as claim, evidence and reasoning.
• Keep an error log and redo every missed question.
• Take two or three full timed practice exams in the final month.

Quick check