Is AP Physics 1 hard? Why its pass rate was the lowest of any AP for years, what changed in the revised course, how it compares with AP Physics 2, AP Physics C, AP Chemistry and AP Biology, who should take it, and how to score a 4 or 5

AP Physics 1 has a strange place among AP courses. It needs no calculus, its content is a single year of mechanics, and for most of its history it had the lowest pass rate of any AP exam. Students who expected an easier physics found the opposite. This page explains why, what has changed, how it compares with the other science APs, and what actually produces a 4 or 5.

Why a course with only algebra was so hard

Three reasons, and none is the maths.

1. The questions ask for reasoning, not answers. A typical free-response question gives a situation, asks you to predict what happens, and then asks you to justify it in words, with a diagram, or with an argument from a principle. "Explain why" and "justify your answer" appear in nearly every question. Students trained to find the formula and plug in have nothing to write.

2. One year of mechanics, deeply. Kinematics, forces, energy, momentum, rotation, simple harmonic motion, and (in the revised course) fluids. There is nowhere to hide: every question draws on a small set of ideas, so the ideas have to be really understood.

3. The exam rewards models over memory. You are given the equation sheet. What you cannot be given is knowing which equation applies and why, which is the whole test.

For years the result was that fewer than half of students scored a 3 or above, and only a few percent scored a 5.

What changed

From the 2025 exam, the College Board revised the course description and the exam. The content was reorganised into units, fluids moved into Physics 1, the free-response section was restructured, and the scoring was recalibrated so that scores better reflected what students knew. Pass rates rose substantially in the first year of the revised exam. The questions still ask for explanation and justification, so the way to prepare has not changed; what changed is that a student who understands the material is now more likely to see it in the score.

How it compares

The broader question of physics against chemistry, with a check that predicts which you will find harder, is in is physics harder than chemistry. AP Chemistry on its own is in is AP Chemistry hard.

Who should take it, and when

• Take it if you are comfortable with algebra, can rearrange an equation without thinking, and like being asked why. It is the right first physics course for students heading toward engineering, medicine or the sciences.
• Take it in 10th or 11th grade, after Geometry, with Algebra 2 at least under way. Trigonometry helps from the first unit.
• Think twice if algebra is still a struggle. A year of regular physics first, or Algebra 2 first, produces a better AP score later than a weak attempt now.
• If you will take Physics C anyway, some schools let strong students skip Physics 1; ask. Many students find Physics 1 first makes Physics C much easier.

The exam

Two sections, each worth half the score. A multiple-choice section, including some questions with more than one correct answer, and a free-response section with a small number of longer questions that include experimental design, a quantitative and qualitative translation question, and extended argument. The equation sheet is provided. The precise numbers of questions and the timing are set by the College Board and have changed with the revision, so check the current course and exam description.

How to score a 4 or 5

1. Learn each principle as a sentence you can say. "Net force equals mass times acceleration" is not it. "If the forces on an object do not balance, it accelerates in the direction of the net force, and the bigger the mass, the smaller the acceleration" is it.
2. Draw before you calculate. Free-body diagrams for every force question, energy bar charts for every energy question, before-and-after sketches for momentum. The diagram is often where the marks are.
3. Practise explaining. For every problem you solve, write two sentences saying why the method works. This is the skill the exam tests and the one classes rarely practise.
4. Use the equation sheet from day one, so that you learn which equation applies when, rather than memorising the equations themselves.
5. Do released free-response questions with the scoring guidelines beside you. Mark your own answers. You will see how little credit a correct number earns without the reasoning.
6. Fix the algebra underneath. Rearranging, ratios, proportional reasoning ("if the mass doubles, what happens to...?") and basic trigonometry. Most lost marks in calculation questions are algebra.

The habits that make physics manageable in general, and the five that most students lack, are in why is physics so hard.

Where to get help

A 1-on-1 online AP Physics 1 class with a tutor who holds a master's in physics: the ideas as sentences and diagrams, released free-response questions marked to the College Board's own scoring guidelines, and the algebra fixed alongside. Also for AP Physics 2 and C, and for regular and honors physics. The free 30-minute first class is a real lesson on the unit you are on.

Questions parents ask

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