5 Steps to a 5: AP Physics 2: Algebra-Based 2023
Book Preface
You are in AP Physics 2, which means you probably just completed—or survived—AP Physics 1 last year. You already have a good idea of what is involved in getting ready for an AP Physics exam. AP Physics 2 builds upon the material you’ve already learned in AP Physics 1. Be sure to keep your 5 Steps to a 5 AP Physics 1 book handy for reviewing material you learned last year. I’m Chris, and I am going to be your friendly guide throughout the process of getting prepared for your AP exam.
Why This Book?
To have a good understanding of what makes this book special, it would probably be helpful if you knew a little bit about me. I’ve been an aerospace engineer, so I have experience in how physics is used in the real world. I have run workshops for teachers, helping them become successful with their own students. I’ve been teaching all varieties of AP Physics 1, 2, B, and C for more than 25 years, to students just like you in all types of schools—inner-city schools, suburban schools, magnet schools, charter schools—schools big and small. In every one of these schools, there are students, just like you, who learn to love and excel in AP Physics because it makes such beautiful sense.
That’s where I come in—helping you make sense of it all. I’ve got a pretty good idea what is needed for you to do well on the AP exam. Throughout this book you will find:
• Clear, simple-to-understand text
• A thorough explanation of all the topics you will need to know
• Problem-solving tips and solutions
• An introduction to the student-tested Five-Step Program to mastering the AP Physics 2 exam
Organization of the Book: The Five-Step Program
You will be taking a comprehensive AP exam this May. Since this is not your first AP Physics exam, you already understand the structure of the exam and how thoroughly you need to understand the material. When you walk into that exam, you want to feel excited but calm, as if you are looking forward to showing off what you can do, not apprehensive or uncertain. Following the Five-Step Program is the best way to prepare and give yourself the best chance to earn that 5.
Step 1: Set Up Your Study Program
As you already know from having taken AP Physics 1, you cannot memorize your way through physics, and you can’t cram overnight. Success on the AP exam is the result of diligent practice over the course of months, not the result of an all-nighter on the evening before the exam. Step 1 gives you the background structure you need before you even start exam preparation.
Step 2: Determine Your Test Readiness
A problem on the AP exam usually requires conceptual development, considerable problem solving, or critical thinking skills. AP questions do not ask for straightforward facts that you can memorize. The AP Physics exam is designed to test the depth of your understanding of physics concepts and how well you can apply them. But you’re going to have to know those basic physics concepts in order to solve more difficult problems, including the ones you learned in AP Physics 1, so remember to keep last year’s 5 Steps to a 5 book handy!
You can’t learn physics passively; you have to be actively engaged to truly understand the concepts. A good place to start preparing for the test is by quizzing yourself. This way you’ll know your areas of strength and weakness. The 5 Steps fundamentals quiz in Chapter 4 will diagnose your areas of strength and weakness. Once you can answer every question on the fundamentals quiz quickly and accurately, you’re ready for deeper questions that will challenge you on the AP exam.
Step 3: Develop Strategies for Success
Since this isn’t your first AP Physics exam, you already know that an AP Physics test requires a much different approach than just about any other exam you’ve taken. You will be getting a reference table with equations on it for the entire exam, but it is still critical to know your equations and understand what they mean. Memorizing equations is not absolutely necessary, but it is very helpful. Having the equations stored in your “mental toolbox” means you never have to take the time to search around the reference table looking for an equation or wonder what relationship is needed to solve a problem. You will always have the reference table as a backup, but you will be surprised how many equations you know without even trying.
An important tool in your arsenal for succeeding on the AP exam is the ability to predict the behavior of a system based upon a physics equation, such as ranking things from largest to smallest. I’ll discuss some methods to help you become successful with those problems.
Step 4: Review the Knowledge You Need to Score High
This is a comprehensive review of all the topics on the AP exam. Now, you’ve probably been in an AP Physics class all year; you’ve likely read1 your textbook. Our review is meant to be just that—review, in a readable format, and focused exclusively on the AP exam.
These review chapters are appropriate both for quick skimming, to remind yourself of key points, and for in-depth study, with plenty of practice problems for you to work through. I do not go into nearly as much detail as a standard textbook, but the advantage of the lack of detail is that you can focus on only those issues specific to the AP Physics 2 exam.
Step 5: Build Your Test-Taking Confidence
Here are three full-length practice tests. Unlike other practice tests you may take, this one comes with thorough explanations. One of the most important elements in learning physics is making, and then learning from, mistakes. I don’t just tell you what you got wrong; I explain why your answer is wrong, and how to do the problem correctly. It’s okay to make a mistake here, because if you do, you won’t make that same mistake again on the “big day” in May.
CONTENTS
Acknowledgments
About the Author
Introduction: The Five-Step Program
STEP 1 Set Up Your Study Program
1 How to Approach Your AP Physics Course
Ignore Your Grade
Don’t Bang Your Head Against a Brick Wall
Work with Other People
Ask Questions When Appropriate
Keep an Even Temper
Don’t Cram
2 What You Need to Know About the AP Physics 2 Exam
Some Frequently Asked Questions About the AP Physics 2 Exam
3 Building Your Personal Attack Plan
Memorization and Cramming Won’t Help
Building a Plan That Is Right for You
Plan A: I’m Starting in September
Plan B: I’m Starting in January
Plan C: It’s Spring Break and I Just Got Started!
STEP 2 Determine Your Test Readiness
4 Test Yourself: AP Physics 2 Fundamentals
AP Physics 2 Fundamentals Self-Assessment
Answers to AP Physics 2 Fundamentals Self-Assessment
What Do I Know, and What Don’t I Know?
5 Test Yourself: AP Physics 2 Question Types
AP Physics 2 Question-Types Self-Assessment
Answers to AP Physics 2 Question-Types Assessment
STEP 3 Develop Strategies for Success
6 General Strategies
What Do I Need to Remember from AP Physics 1?
Tools You Can Use
Get to Know the Relationships
What Information Can We Get from a Graph?
Ranking Task Skills
7 Strategies for the Multiple-Choice Questions
Multiple-Choice Basics
How to Get Better at Multiple-Choice Problems
Multiple-Correct Questions
Time: Pace Yourself!
Additional Strategies and Words of Wisdom
8 Strategies for the Free-Response Questions
The Structure of the Free-Response Section
Getting Off to a Good Start
Lab Questions
Practice Designing a Lab
Paragraph-Length Arguments
Student-Contention Questions
Qualitative-Quantitative Transition (QQT) Questions
What the Exam Reader Looks For
Final Advice About the Free-Response Section
STEP 4 Review the Knowledge You Need to Score High
9 Fluid Mechanics
How the Nano-World Influences the Fluid World We Live In
Density
Pressure
Static Fluids
Applications of Static Fluids
Barometer
Buoyancy and Archimedes’ Principle
Dynamic Fluids—Continuity
Dynamic Fluids—Bernoulli’s Equation
Practice Problems
Solutions to Practice Problems
Rapid Review
10 Thermodynamics and Gases
Start Small—Atomic Behavior That Produces Thermal Results
Heat, Temperature, and Power
Heat Transfer
Kinetic Theory of Gases
Ideal Gas Law
First Law of Thermodynamics
PV Diagrams
Round and Round We Go: Cycles
Four Special Processes (Paths) on a PV Diagram
Entropy
Practice Problems
Solutions to Practice Problems
Rapid Review
11 Electric Force, Field, and Potential
Electric Charge
Quanta of Charge, Conservation of Charge, and How Charge Moves Around
Charge Distribution on Different Objects
Electric Fields
Force of an Electric Field
Electric Field Vector Diagrams
Electric Potential
Equipotential Isolines
Special Geometries for Electrostatics
Electric Fields Around a Point Charge and a Charged Conducting Sphere
Electric Potential Associated with a Point Charge and a Charged Conducting Sphere
The Force Between Two Charges
Mechanics and Charges
Practice Problems
Solutions to Practice Problems
Rapid Review
12 Electric Circuits
Current
Resistance and Ohm’s Law
Ohmic Versus Nonohmic
Resistors in Series and in Parallel
The V-I-R Chart
Kirchhoff’s Rules
Circuits from an Experimental Point of View
Real Batteries and Internal Resistance
Changes in a Circuit—Switches
Capacitors
Parallel and Series Capacitors
RC Circuits
Practice Problems
Solutions to Practice Problems
Rapid Review
13 Magnetism and Electromagnetic Induction
Magnetic Fields
Magnetic Dipoles in a Magnetic Field
Magnetic Field Around a Straight Current-Carrying Wire
Force on a Moving Charged Particle
Magnetic Force on a Wire
Force Between Two Parallel Wires
Charges in a Magnetic Field and the Mass Spectrometer
Particles Moving Through Both Magnetic and Electric Fields
Magnetic Flux
Electromagnetic Induction
Magnetic Behavior of Materials
Practice Problems
Solutions to Practice Problems
Rapid Review
14 Geometric and Physics Optics
Transverse and Longitudinal Waves
The Wave Equation
Interference
Electromagnetic Waves
Polarization
Diffraction and the Point-Source Model
Single and Double Slits
Index of Refraction
Thin Films
Wave Behavior at Boundaries
Reflection and Mirrors
Snell’s Law and the Critical Angle
Lenses
Practice Problems
Solutions to Practice Problems
Rapid Review
15 Quantum, Atomic, and Nuclear Physics
What Is Modern Physics?
Space, Time, the Speed of Light, and E = mc2
Subatomic Particles
The Electron-Volt
Photons
Photoelectric Effect
Photon Momentum
De Broglie Wavelength and Wave Functions
Bohr Model of the Atom and Energy Levels in an Atom
Three Types of Nuclear Decay Processes
E = mc2 and Conservation During Nuclear Reactions
Half-Life
Other Nuclear Reactions
Mass Defect, Binding Energy, and the Strong Nuclear Force
Practice Problems
Solutions to Practice Problems
Rapid Review
STEP 5 Build Your Test-Taking Confidence
The AP Physics 2 Practice Exams
Taking the Practice Exams
Test-Taking Strategies
AP Physics 2 Practice Exam 1: Section 1 (Multiple Choice)
AP Physics 2 Practice Exam 1: Section 2 (Free Response)
AP Physics 2 Practice Exam 1: Solutions: Section 1 (Multiple Choice)
AP Physics 2 Practice Exam 1: Solutions: Section 2 (Free Response)
How to Score Practice Exam 1
AP Physics 2 Practice Exam 2: Section 1 (Multiple Choice)
AP Physics 2 Practice Exam 2: Section 2 (Free Response)
AP Physics 2 Practice Exam 2: Solutions: Section 1 (Multiple Choice)
AP Physics 2 Practice Exam 2: Solutions: Section 2 (Free Response)
How to Score Practice Exam 2
AP Physics 2 Practice Exam 3: Section 1 (Multiple Choice)
AP Physics 2 Practice Exam 3: Section 2 (Free Response)
AP Physics 2 Practice Exam 3: Solutions: Section 1 (Multiple Choice)
AP Physics 2 Practice Exam 3: Solutions: Section 2 (Free Response)
How to Score Practice Exam 3
Words of Encouragement
Appendix
Constants
AP Physics 2 Equations
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