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Whether you want some extra practice for your college or high school physics class, you want to refresh your memory about a course you took long ago, or you’re simply curious about the way the universe works, you’ve found the right book. After all, the best way to learn physics is to do physics, and the hundreds of problems in this book give you plenty of opportunity to do physics. You can practice as much as you like and become a pro at figuring out the right way to start out all sorts of problems that you’d expect to see in the first semester of a one-year physics course.

Why doesn’t the moon crash into the earth? How is it possible to sleep on a bed of nails? Why does the water level in your glass stay the same when the ice melts? By working through the many problems in this book, you’ll be better able to explain these and other mysteries of the universe to your friends.

What You’ll Find

The Physics I practice problems in this book are divided into 15 chapters, beginning with foundational practice (such as calculating displacement and working with vectors); moving on to forces, energy, and momentum; and wrapping up with thermodynamics. Some of the questions require you to reference a diagram, but that instruction is always clear within the questions.

Chapter 16 contains the solutions to all of the practice problems, as well as detailed explanations that help you understand how to come up with the correct answer. If you get a particular question wrong, though, don’t just read the answer explanation and move on. Instead, try solving the question again because you know that now you won’t make the same mistake that got you to the original wrong answer in the first place. (After all, sometimes knowing what not to do is a great start in discovering what to do.)

Whatever you do, stay positive. The harder questions in this book aren’t meant to discourage you. Rather, they’re meant to prove to you just how well you can understand the many challenging concepts presented in a typical Physics I class.

How This Workbook Is Organized

This workbook is divided into two main parts: the questions and the answers.

Part I: The Questions

The questions in this book cover the following topics:

✓ Math basics: To learn physics, you need to know a little bit of math. (Just a little!) Chapter 1 checks your knowledge of basic algebra, trigonometry, units, and significant digits.

✓ Kinematics: The basic quantities you use to describe motion are displacement, velocity, and acceleration. In Chapter 2 you practice one-dimensional motion problems. Chapter 3 deals with the two-dimensional case.

✓ Forces: Newton’s laws relate forces and motion. Chapter 4 has you applying Newton’s laws; Chapter 5 questions you on friction and gravitational force.

✓ Angular motion: The linear quantities you use to describe motion and forces have angular analogues. Chapter 6 checks your knowledge of angular velocity and angular acceleration. In Chapter 7 you practice solving circular motion problems. Chapter 11 deals with torque, angular momentum, and rotational kinetic energy.

✓ Energy and momentum: You can discover a lot about the world around you by studying conserved quantities such as energy and momentum. Chapter 9 features work- and energy-related problems; Chapter 10 focuses on momentum and collisions.

✓ Simple harmonic motion: Periodic motion occurs repeatedly in nature, which is why Chapter 12 has you practice working with springs and pendula.

✓ Liquids, gases, and thermodynamics: Dealing with macroscopic properties is often easier than keeping track of the motion of each molecule. Chapter 8 focuses on density, pressure, and flow rates of liquids and gases. In Chapter 13 you examine temperature, heat, and heat transfer. Chapter 14 questions you on the ideal gas law, and Chapter 15 gets you applying the laws of thermodynamics to heat engines, heat pumps, and other situations.

Part II: The Answers

Here’s where you can find detailed answer explanations for every question in this book. Find out how to set up and work through all the problems so that you arrive at the correct solution.

Beyond the Book

Your purchase of this book gives you so much more than just several hundred problems you can work on to improve your understanding of physics. It also comes with a free, one-year subscription to hundreds of practice questions online. Not only can you access this digital content anytime you want, on whichever device is available to you, but you can also track your progress and view personalized reports that show you which concepts you need to study the most.

What you’ll find

The online practice that comes free with this book offers you the same questions and answers that are available here along with hundreds more. And online, they’re in a multiple-choice format. What’s great about this format is that it allows you to zero in on the details that can make or break your solution. Sometimes one (or more) of the incorrect answer options is the result of a calculation error. When you catch yourself making such a common error, you’ll know not to take the same approach with similar problems on a graded test, when the right answers really count.

Of course, the real beauty of the online problems is the ability to customize your practice. In other words, you get to choose the types of problems and the number of problems you want to tackle. The online program tracks how many questions you answer correctly versus incorrectly so you can get an immediate sense of which topics need more of your attention.

This product also comes with an online Cheat Sheet that helps you increase your odds of performing well in your Physics I class. Check out the free Cheat Sheet at www.dummies.com/cheatsheet/physics1practice. (No access code required. You can benefit from this info before you even register.)

How to register

To gain access to additional tests and practice online, all you have to do is register. Just follow these simple steps:

1. Find your PIN access code:

• Print-book users: If you purchased a print copy of this book, turn to the inside front cover of the book to find your access code.

• E-book users: If you purchased this book as an e-book, you can get your access code by registering your e-book at www.dummies.com/go/getaccess. Go to this website, find your book and click it, and answer the security questions to verify your purchase. You’ll receive an email with your access code.

2. Go to Dummies.com and click Activate Now.

3. Find your product (Physics I Practice Problems For Dummies) and then follow the on-screen prompts to activate your PIN.

Now you’re ready to go! You can come back to the program as often as you want – simply log on with the username and password you created during your initial login. No need to enter the access code a second time.

For Technical Support, please visit http://wiley.custhelp.com or call Wiley at 1-800-762-2974 (U.S.), +1-317-572-3994 (international).

Your registration is good for one year from the day you activate your PIN. After that time frame has passed, you can renew your registration for a fee. The website gives you all the important details about how to do so.

Where to Go for Additional Help

The solutions to the practice problems in this book are meant to walk you through how to get the right answers; they’re not meant to teach the material. If certain physics concepts are unfamiliar to you, you can find help at www.dummies.com. Just type “physics I” into the search box to turn up a wealth of physics-related articles.

If you need more detailed instruction, check out Physics I For Dummies, 2nd Edition; Physics I Workbook For Dummies, 2nd Edition; and Physics Essentials For Dummies, all written by Steven Holzner and published by Wiley.