AP Physics 1 vs. AP Physics 2: Understanding the Difference
12 August, 2026 | Abhishek Malani | 9 Min Read
Introduction
If you’re trying to figure out AP Physics 1 vs AP Physics 2, here’s the short version: they’re both algebra-based (no calculus required), both now share an identical exam format, but they cover almost entirely different physics content. Physics 1 is mechanics; Physics 2 is everything else: thermodynamics, electricity, magnetism, optics, and modern physics. Neither is a prerequisite for college credit in the other, but most schools still teach Physics 1 first.
Table of Contents
What Is AP Physics?
Advanced Placement Physics actually refers to four separate courses: AP Physics 1 and AP Physics 2 (both algebra-based), and AP Physics C: Mechanics and AP Physics C: Electricity and Magnetism (both calculus-based, aimed at future engineering and physics majors). This guide focuses on the algebra-based pair, since those are the two most commonly compared and most commonly taken by students who aren’t yet calculus-ready.
What Is AP Physics 1?
AP Physics 1 is the equivalent of a first-semester, algebra-based introductory college physics course, covering classical mechanics: motion, forces, energy, momentum, rotation, oscillations, and, as of the 2025 redesign, fluids. It has no prerequisite, though comfort with algebra and basic trigonometry matters, since the course is genuinely reasoning-heavy rather than formula-memorization-heavy.
AP Physics 1’s 8 units: Kinematics; Force and Translational Dynamics; Work, Energy, and Power; Linear Momentum; Torque and Rotational Dynamics; Energy and Momentum of Rotating Systems; Oscillations; Fluids (added in 2025, moved over from Physics 2).
Units 2 (Force and Translational Dynamics) and 3 (Work, Energy, and Power) are the heaviest, together making up 18–23% each of the exam, roughly 40% combined.
What Is AP Physics 2?
AP Physics 2 is the equivalent of a second-semester, algebra-based college physics course. Rather than continuing mechanics, it moves into an entirely different set of topics: thermodynamics, electricity and magnetism, optics, and modern (quantum, atomic, and nuclear) physics. Fluids was removed from Physics 2 starting with the 2025 exam and now lives exclusively in Physics 1.
AP Physics 2’s core content areas: Thermodynamics; Electric Force, Field, and Potential; Electric Circuits; Magnetism; Optics; and Modern, Atomic, and Nuclear Physics, organized into 7 units. Electric Force/Field/Potential and Electric Circuits are consistently the most heavily tested areas, both in multiple-choice weighting and in free-response frequency.
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AP Physics 1 vs. AP Physics 2: Quick Comparison
| AP Physics 1 | AP Physics 2 | |
|---|---|---|
|
Content
|
Mechanics: motion, forces, energy, momentum, rotation, oscillations, fluids
|
Thermodynamics, electricity, magnetism, optics, modern physics
|
|
Math level
|
Algebra and basic trigonometry
|
Algebra and basic trigonometry
|
|
Prerequisite
|
None
|
None officially, though Physics 1 content (or equivalent) is genuinely helpful
|
|
Units
|
8
|
7 |
|
Exam format
|
40 MC + 4 FRQ, hybrid digital, 3 hours, 50/50 weighting
|
Identical: 40 MC + 4 FRQ, hybrid digital, 3 hours, 50/50 weighting
|
|
2025 pass rate
|
67.3% (mean 3.12)
|
~72.6% (2024: 70.5%, mean 3.20)
|
|
Heaviest units
|
Force/Dynamics and Work/Energy/Power (18–23% each)
|
Electric Force/Field/Potential and Circuits
|
Same Exam Format, Different Content
As part of a 2025 redesign, the two courses now share an identical exam structure: 40 multiple-choice questions and 4 free-response questions, completed in 3 hours as a hybrid digital exam, multiple-choice through Bluebook, free-response handwritten in a paper booklet. Both sections carry equal 50% weight, and a calculator is now permitted throughout both sections. The 4 FRQs on both exams follow the same standardized types: Mathematical Routines, Translation Between Representations, Experimental Design and Analysis, and Qualitative/Quantitative Translation.
Because the formats are now identical, the real decision between the two courses comes down entirely to content and interest, not exam mechanics.
Which Should You Take First?
There’s no official prerequisite requiring Physics 1 before Physics 2, but most schools teach them in that order: Physics 2’s electricity and circuits units lean on force and energy concepts Physics 1 builds first. Some strong students take Physics 2 without Physics 1, particularly as a standalone elective, but they typically need to backfill mechanics fundamentals independently. Many students also take both, either in the same year or across two years alongside AP Chemistry or AP Physics C.
How Hard Is Each Exam?
Both exams have historically had a reputation for being tough, but that shifted significantly for Physics 1 after its 2025 redesign.
- AP Physics 1: In 2025, the first year of the new format, 67.3% of test-takers scored a 3 or higher, with a mean score of 3.12, based on 174,992 test-takers. That’s a dramatic jump from 2024’s roughly 47% pass rate and 10% rate of 5s, the single largest year-over-year improvement of any AP exam that cycle, driven by more time per question, calculator access throughout, and the removal of a punishing multi-select question format.
- AP Physics 2: Results have stayed more stable, with a 2024 pass rate of 70.5% (mean 3.20, 19.1% earning a 5, based on 22,804 test-takers) and 2025 landing around 72.6%. Physics 2 draws a smaller, more self-selected pool than Physics 1, since fewer schools offer it and it’s often taken by students who already succeeded in Physics 1.
Which One Should You Choose?
If you’re only taking one algebra-based physics course, the choice usually comes down to interest and major plans:
- Choose Physics 1 if you want a foundational, widely offered course covering mechanics, the physics of everyday motion, forces, and energy, or if your school only offers one algebra-based physics option.
- Choose Physics 2 if you’re specifically interested in electricity, optics, or modern physics, or if you’re a pre-med or biology-track student, since Physics 2’s content (especially electricity, circuits, and optics) tends to align more closely with MCAT-style physics content than Physics 1 alone.
- Choose both if your school allows it and you want the broadest possible algebra-based physics foundation before college, particularly useful for engineering-bound students who aren’t yet ready for calculus-based Physics C.
Neither course requires the other for college credit purposes; colleges generally evaluate Physics 1 and Physics 2 scores independently, each potentially fulfilling a separate lab-science requirement.
Summary
AP Physics 1 and AP Physics 2 are both algebra-based, non-calculus physics courses that, as of the 2025 redesign, now share an identical exam format: 40 multiple-choice questions and 4 free-response questions in a 3-hour hybrid digital exam, split 50/50, with a calculator permitted throughout. Despite the shared format, their content barely overlaps. Physics 1 covers mechanics across 8 units, kinematics, forces, energy, momentum, rotation, oscillations, and fluids (moved over from Physics 2 in 2025), with Force/Dynamics and Work/Energy/Power as its heaviest units. Physics 2 covers thermodynamics, electricity, magnetism, optics, and modern physics across 7 units, with Electric Force/Field/Potential and Circuits as its heaviest.
Physics 1’s 2025 redesign produced the largest year-over-year score jump of any AP exam, from a 47% pass rate in 2024 to 67.3% in 2025, while Physics 2 has stayed more consistently in the low-to-mid 70s. Most schools teach Physics 1 first, since Physics 2’s electricity and circuits content leans on force and energy reasoning built in Physics 1, though neither is an official prerequisite for the other, and colleges typically grant credit for each independently. The right choice ultimately depends on interest, mechanics and everyday motion for Physics 1, or electricity, optics, and modern physics for Physics 2, and pre-med-track students in particular often lean toward prioritizing Physics 2’s content given its closer alignment with standardized test science sections.
FAQs
Since the 2025 redesign, Physics 1’s pass rate (67.3%) sits somewhat below Physics 2’s (around 72.6%), but Physics 2 draws a more self-selected pool of students who’ve often already succeeded in Physics 1, which likely inflates its results somewhat.
There’s no official prerequisite, but most schools teach Physics 1 first, and Physics 2’s electricity and circuits content benefits from the force and energy reasoning Physics 1 builds.
No. AP Physics 1 and 2 are algebra-based; AP Physics C: Mechanics and AP Physics C: Electricity and Magnetism are calculus-based and significantly more mathematically demanding, typically taken by students already comfortable with AP Calculus.
Both now use an identical format: 40 multiple-choice questions and 4 free-response questions in a 3-hour hybrid digital exam (multiple-choice via Bluebook, free-response handwritten), each section worth 50% of the score, with a calculator permitted throughout.
Yes, typically. Colleges generally evaluate the two exams independently, and many award separate credit or lab-science fulfillment for each, though policies vary by institution.
Have questions about which algebra-based physics course fits your goals? Reach out to Quest for Success; we’re here to help you map out your science course sequence and build a study plan for whichever path you choose.