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Physics Essentials For Dummies (9781119590286) was previously published as Physics Essentials For Dummies (9780470618417). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product. For students who just need to know the vital concepts of physics, whether as a refresher, for exam prep, or as a reference, Physics Essentials For Dummies is a must-have guide. Free of ramp-up and ancillary material, Physics Essentials For Dummies contains content focused on key topics only. It provides discrete explanations of critical concepts taught in an introductory physics course, from force and motion to momentum and kinetics. This guide is also a perfect reference for parents who need to review critical physics concepts as they help high school students with homework assignments, as well as for adult learners headed back to the classroom who just need a refresher of the core concepts. The Essentials For Dummies Series Dummies is proud to present our new series, The Essentials For Dummies. Now students who are prepping for exams, preparing to study new material, or who just need a refresher can have a concise, easy-to-understand review guide that covers an entire course by concentrating solely on the most important concepts. From algebra and chemistry to grammar and Spanish, our expert authors focus on the skills students most need to succeed in a subject.
Auteur
Steven Holzner, PhD, was a contributing editor at PC Magazine and was on the faculty of both MIT and Cornell University. He wrote Physics For Dummies, Physics II For Dummies, and Quantum Physics For Dummies.
Texte du rabat
Key concepts in quick, focused lessons Your helpful guide to physics essentials From force and motion to momentum and energy, Physics Essentials For Dummies bypasses the fluff and focuses solely on the critical concepts taught in an introductory physics course. Discover how physics plays into every aspect of the world around you. Explore displacement, speed, velocity, and acceleration and learn how they fit together. This handy reference provides concise explanations of key subjects using real-world examples, so it's perfect for clarifying concepts and helping you cram for exams. Inside...
Résumé
Physics Essentials For Dummies (9781119590286) was previously published as Physics Essentials For Dummies (9780470618417). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product.
For students who just need to know the vital concepts of physics, whether as a refresher, for exam prep, or as a reference, Physics Essentials For Dummies is a must-have guide. Free of ramp-up and ancillary material, Physics Essentials For Dummies contains content focused on key topics only. It provides discrete explanations of critical concepts taught in an introductory physics course, from force and motion to momentum and kinetics. This guide is also a perfect reference for parents who need to review critical physics concepts as they help high school students with homework assignments, as well as for adult learners headed back to the classroom who just need a refresher of the core concepts.
The Essentials For Dummies Series
Dummies is proud to present our new series, The Essentials For Dummies. Now students who are prepping for exams, preparing to study new material, or who just need a refresher can have a concise, easy-to-understand review guide that covers an entire course by concentrating solely on the most important concepts. From algebra and chemistry to grammar and Spanish, our expert authors focus on the skills students most need to succeed in a subject.
Contenu
Introduction 1
About This Book 1
Conventions Used in This Book 2
Foolish Assumptions 2
Icons Used in This Book 3
Where to Go from Here 3
Chapter 1: Viewing the World through the Lens of Physics 5
Figuring Out What Physics is About 5
Paying Attention to Objects in Motion 6
Getting Energized 7
Moving as Fast as You Can: Special Relativity 8
Measuring Your World 9
Keeping physical units straight 9
Converting between units of measurement 10
Nixing some zeros with scientific notation 11
Knowing which digits are significant 12
Chapter 2: Taking Vectors Step by Step 15
Getting a Grip on Vectors 15
Looking for direction and magnitude 16
Adding vectors 17
Subtracting vectors 18
Waxing Numerical on Vectors 19
Working with Vector Components 20
Using magnitudes and angles to find vector components 20
Using vector components to find magnitudes and angles 22
Chapter 3: Going the Distance with Speed and Acceleration 25
From Here to There: Dissecting Displacement 26
Examining axes 27
Measuring speed 28
The Fast Track to Understanding Speed and Velocity 29
How fast am I right now? Instantaneous speed 30
Staying steady: Uniform speed 30
Changing your speed: Nonuniform motion 30
Doing some calculations: Average speed 31
Contrasting average speed and instantaneous speed 31
Speeding Up (or Slowing Down): Acceleration 33
Defining our terms 33
Recognizing positive and negative acceleration 33
Looking at average and instantaneous acceleration 34
Accounting for uniform and nonuniform acceleration 35
Bringing Acceleration, Time, and Displacement Together 35
Locating not-so-distant relations 36
Equating more speedy scenarios 37
Putting Speed, Acceleration, and Displacement Together 38
Chapter 4: Studying Circular Motions 41
Understanding Uniform Circular Motion 42
Creating Centripetal Acceleration 43
Seeing how centripetal acceleration controls velocity 44
Calculating centripetal acceleration 44
Finding Angular Equivalents for Linear Equations 45
Chapter 5: Push-Ups and Pull-Ups: Exercises in Force 49
Reckoning with Force 49
Objects at Rest and in Motion: Newton's First Law 50
Calculating Net Force: Newton's Second Law 51
Gathering net forces 52
Just relax: Dealing with tension 56
A balancing act: Finding equilibrium 57
Equal and Opposite Reactions: Newton's Third Law 60
Chapter 6: Falling Slowly: Gravity and Friction 63
Dropping the Apple: Newton's Law of Gravitation 63
Down to Earth: Dealing with Gravity 65
Leaning Vertically with Inclined Planes 66
Facing Friction 68
Figuring out the normal force 69
Finding the coefficient of friction 69
Bringing static and kinetic friction into the mix 71
Dealing with uphill friction 73
Chapter 7: Putting Physics to Work 77
Wrapping Your Mind around Work 77
Pushing your weight 78
Taking a drag 79
Working Backward: Negative Work 80
Working Up a Sweat: Kinetic Energy 81
Breaking down the kinetic energy equation 82
Using the kinetic energy equation 83
Calculating kinetic energy by using net force 85
Saving Up: Potential Energy 87
Working against gravity 87
Converting potential energy into kinetic energy 88
Pitting Conservative against Nonconservative Forces 89 No Work Required: The Conservation of Mechanical Energy 91...