Is AP Physics 1 Hard? 2025 Pass Rates and How to Prepare

AP Physics 1 is hard but beatable: 67.3% of the 174,992 students who took the May 2025 exam scored a 3 or higher, up from 47.3% in 2024 under the old course. It is still the lowest-passing of the four AP physics exams, and the concept-first free-response questions are the main challenge.

Course-level guide covering the whole 8-unit AP Physics 1: Algebra-Based course (effective fall 2024). Score data comes from the College Board 2024 and 2025 AP Physics 1 score distributions.

How hard is AP Physics 1 really?

AP Physics 1 is hard, and the data backs that up, but the 2025 numbers are the friendliest in years. On the May 2025 exam, 67.3% of students scored a 3 or higher, the mean score was 3.12, and 174,992 students sat for it. In 2024, the last year of the old course, just 47.3% passed with a mean of 2.59. That 20.0 point jump in the pass rate arrived with the redesigned 8-unit course, which pulled Fluids in from Physics 2 and put a calculator in your hands on both sections.

Physics 1 still shows up on every list of the hardest AP exams, and it remains the lowest-passing and largest of the four AP physics exams. The algebra is manageable. The reasoning is what gets people: the exam asks you to explain, predict, and design experiments rather than plug numbers into formulas.

The 2025 score distribution, next to the other physics exams

Here is the full 2025 AP Physics 1 score distribution:

Score	Percent of test takers
5	19.7%
4	24.7%
3	22.9%
2	13.4%
1	19.3%

Read the two ends of that table. Nearly one in five students earned a 5, and nearly one in five earned a 1. The exam separates prepared students from unprepared students sharply, which is good news if you plan ahead: preparation moves you a long way here.

For comparison, all four AP physics exams in 2025:

Exam (2025)	Passed (3+)	Mean	Test takers
Physics 1	67.3%	3.12	174,992
Physics 2	72.6%	3.38	24,322
Physics C: Mechanics	73.1%	3.30	66,267
Physics C: E&M	72.8%	3.37	29,910

Physics 1 has the lowest pass rate of the four and more test takers than the other three combined.

What actually makes it hard

The format explains a lot. The exam runs 3 hours: 42 multiple-choice questions in 85 minutes (50% of your score), then 4 free-response questions in 95 minutes (the other 50%). The multiple-choice pace, about 2 minutes per question, punishes anyone who has to re-derive the basics on the spot.

The four FRQs are always the same types: Mathematical Routines, Translation Between Representations, Experimental Design and Analysis, and Qualitative/Quantitative Translation. Only the first is mainly calculation. Translation Between Representations moves you between graphs, equations, free-body diagrams, and written descriptions of one situation. Experimental Design hands you equipment on paper and asks you to plan a procedure and defend the analysis. Qualitative/Quantitative Translation asks you to argue in words why an equation behaves the way it does. If your practice has been pure plug-and-chug, half the free-response section will feel like a different subject. That is the gap the exam is built to expose.

What changed in the redesigned course

The current course, effective fall 2024, has 8 units. The weights below apply to the multiple-choice section:

Unit 1 Kinematics: 10-15%
Unit 2 Force and Translational Dynamics: 18-23%
Unit 3 Work, Energy, and Power: 18-23%
Unit 4 Linear Momentum: 10-15%
Unit 5 Torque and Rotational Dynamics: 10-15%
Unit 6 Energy and Momentum of Rotating Systems: 5-8%
Unit 7 Oscillations: 5-8%
Unit 8 Fluids: 10-15%

Two changes matter most. Fluids moved in from Physics 2 and now carries the same multiple-choice weight as kinematics, so skipping it is not an option. And a four-function, scientific, or graphing calculator is allowed on both sections, which softens the arithmetic and shifts even more of the difficulty onto setup and reasoning. Start with the unit-by-unit breakdown on the AP Physics 1 course page and keep the Physics 1 formula sheet open while you practice.

A prep plan that matches the exam

The course is cumulative, so prepare in order:

Make kinematics automatic. The equation sheet prints exactly three kinematics equations, and the kinematic equations guide shows you how to pick the right one fast. Check your work with the kinematics calculator.

Draw a free-body diagram for every force problem, every time. Units 2 through 6 all build on forces. The free-body diagram guide covers the conventions graders expect, and the free-body diagram builder lets you practice without paper.

Build prediction instincts. In the projectile launcher, guess where the ball lands before you fire. Being wrong out loud is the fastest way to fix a misconception, and predicting before computing mirrors what the FRQs demand.

Treat energy and momentum as bookkeeping, using the conservation of energy and conservation of momentum guides.

Give Fluids real time in the spring with the AP Physics 1 fluids guide. It is new to the course and worth 10-15% of the multiple-choice section.

How to know you are ready

Use three checks. First, take any problem you just solved and explain in one sentence what happens to the answer if you double one input. If you can only re-run the algebra, you are not ready for Qualitative/Quantitative Translation yet. Second, design a simple experiment from scratch: measure g with a stopwatch and a pendulum, decide what to graph, and say what the slope means (the worked example below walks through one). Third, run timed free-response sets. Four questions in 95 minutes is just under 24 minutes each, and pacing is a skill you have to practice separately from physics. If all three feel routine by April, the 2025 numbers are on your side: 44.4% of test takers earned a 4 or a 5, and 67.3% passed.

Mathematical Routines warm-up: braking distance

A car moving at $24.0$ m/s brakes with a constant acceleration of magnitude $6.0 \text{ m/s}^2$ until it stops. How far does the car travel while braking?

List the knowns with the direction of motion as positive: $v_{x0} = 24.0$ m/s, $v_x = 0$ , $a_x = -6.0 \text{ m/s}^2$ . Time is neither given nor asked for, so use the no-time equation from the sheet: $v_x^2 = v_{x0}^2 + 2a_x(x - x_0)$ .
Substitute the numbers: $0 = (24.0)^2 + 2(-6.0)(x - x_0)$ , which gives $0 = 576 \text{ m}^2/\text{s}^2 - (12.0 \text{ m/s}^2)(x - x_0)$ .
Solve for the displacement: $x - x_0 = 576 / 12.0 = 48.0$ m.

The car travels $48.0$ m while braking. Quick check: stopping from $24.0$ m/s at $6.0 \text{ m/s}^2$ takes $t = 24.0/6.0 = 4.0$ s, and an average velocity of $12.0$ m/s over $4.0$ s covers the same $48.0$ m. (That average-velocity shortcut is not printed on the equation sheet, but it follows from the definition of average velocity.)

Unit 8 Fluids: how much of a floating block is underwater?

A wooden block of density $650 \text{ kg/m}^3$ and volume $2.0 \times 10^{-3} \text{ m}^3$ floats in water of density $1000 \text{ kg/m}^3$ . Find the buoyant force on the block and the fraction of its volume that is submerged.

Find the block's weight: $m = \rho V = (650)(2.0 \times 10^{-3}) = 1.30$ kg, so $F_g = mg = (1.30)(9.8) = 12.7$ N.
The block floats in equilibrium, so the buoyant force balances the weight: $F_b = 12.7$ N.
Apply $F_b = \rho V g$ , where $\rho$ is the fluid density and $V$ is the displaced volume: $V = F_b/(\rho g) = 12.7/(1000 \times 9.8) = 1.3 \times 10^{-3} \text{ m}^3$ .
Fraction submerged: $(1.3 \times 10^{-3})/(2.0 \times 10^{-3}) = 0.65$ . That matches the density ratio $650/1000 = 0.65$ , which is the general result for floating objects.

$F_b = 12.7$ N, and 65% of the block's volume sits below the waterline.

Experimental Design practice: measure g with a pendulum

You have a string, a small mass, a meterstick, and a stopwatch. You set the pendulum length to $0.75$ m and time 10 complete oscillations at $17.4$ s. Use $T_p = 2\pi\sqrt{\ell/g}$ to find your experimental value of g.

Timing 10 oscillations instead of 1 shrinks the effect of your reaction time. The period is $T = 17.4/10 = 1.74$ s.
Solve the period equation for g: squaring gives $T^2 = 4\pi^2 \ell / g$ , so $g = 4\pi^2 \ell / T^2$ .
Substitute: $g = 4\pi^2 (0.75)/(1.74)^2 = 29.61/3.028 = 9.78 \text{ m/s}^2$ .
Compare with the accepted $9.8 \text{ m/s}^2$ : the difference is about 0.2%, well within stopwatch precision.

$g \approx 9.78 \text{ m/s}^2$ . On the real Experimental Design FRQ you would go further: vary $\ell$ , plot $T^2$ against $\ell$ , and use the slope $4\pi^2/g$ to extract g from the whole data set.

Frequently asked questions

What is the AP Physics 1 pass rate?

On the May 2025 exam, 67.3% of students scored a 3 or higher, with a mean score of 3.12 across 174,992 test takers. In 2024, the last year of the old course design, the pass rate was 47.3% with a mean of 2.59.

Is AP Physics 1 the hardest AP exam?

It is the lowest-passing of the four AP physics exams: 67.3% passed in 2025, versus 72.6% for Physics 2, 73.1% for Physics C: Mechanics, and 72.8% for Physics C: E&M. Its 2024 pass rate of 47.3% is a big part of why it appears on so many hardest-AP lists, though the redesigned course has narrowed the gap.

Do you need calculus for AP Physics 1?

No. The course is officially titled AP Physics 1: Algebra-Based. You need solid algebra and basic trigonometry (sine, cosine, tangent), but no calculus. If you want the calculus-based mechanics course instead, that is AP Physics C: Mechanics.

Is Fluids on the AP Physics 1 exam?

Yes. Fluids is Unit 8 of the current course and carries 10 to 15% of the multiple-choice section weight. Its four topics are internal structure and density, pressure, fluids and Newton's laws, and fluids and conservation laws. See the Unit 8 page for details.

Can you use a calculator on the AP Physics 1 exam?

Yes. A four-function, scientific, or graphing calculator is allowed on both the multiple-choice and free-response sections. That came with the redesigned course, so use a calculator on every practice set and make it automatic before May.