目次

CHAPTER 1 INTRODUCTION TO STATICS 3 1/1 Mechanics 3 1/2 Basic Concepts 4 1/3 Scalars and Vectors 4 1/4 Newton’s Laws 7 1/5 Units 8 1/6 Law of Gravitation 12 1/7 Accuracy, Limits, and Approximations 13 1/8 Problem Solving in Statics 14 1/9 Chapter Review 18 CHAPTER 2 FORCE SYSTEMS 23 2/1 Introduction 23 2/2 Force 23 SECTION A TWO–DIMENSIONAL FORCE SYSTEMS 26 2/3 Rectangular Components 26 2/4 Moment 38 2/5 Couple 50 2/6 Resultants 58 SECTION B THREE–DIMENSIONAL FORCE SYSTEMS 66 2/7 Rectangular Components 66 2/8 Moment and Couple 74 2/9 Resultants 88 2/10 Chapter Review 99 CHAPTER 3 EQUILIBRIUM 109 3/1 Introduction 109 SECTION A EQUILIBRIUM IN TWO DIMENSIONS 110 3/2 System Isolation and the Free–Body Diagram 110 3/3 Equilibrium Conditions 121 SECTION B EQUILIBRIUM IN THREE DIMENSIONS 145 3/4 Equilibrium Conditions 145 3/5 Chapter Review 163 CHAPTER 4 STRUCTURES 173 4/1 Introduction 173 4/2 Plane Trusses 175 4/3 Method of Joints 176 4/4 Method of Sections 188 4/5 Space Trusses 197 4/6 Frames and Machines 204 4/7 Chapter Review 224 CHAPTER 5 DISTRIBUTED FORCES 233 5/1 Introduction 233 SECTION A CENTERS OF MASS AND CENTROIDS 235 5/2 Center of Mass 235 5/3 Centroids of Lines, Areas, and Volumes 238 5/4 Composite Bodies and Figures; Approximations 254 5/5 Theorems of Pappus 264 SECTION B SPECIAL TOPICS 272 5/6 Beams—External Effects 272 5/7 Beams—Internal Effects 279 5/8 Flexible Cables 291 5/9 Fluid Statics 306 5/10 Chapter Review 325 CHAPTER 6 FRICTION 335 6/1 Introduction 335 SECTION A FRICTIONAL PHENOMENA 336 6/2 Types of Friction 336 6/3 Dry Friction 337 SECTION B APPLICATIONS OF FRICTION IN MACHINES 357 6/4 Wedges 357 6/5 Screws 358 6/6 Journal Bearings 368 6/7 Thrust Bearings; Disk Friction 369 6/8 Flexible Belts 377 6/9 Rolling Resistance 378 6/10 Chapter Review 387 CHAPTER 7 VIRTUAL WORK 397 7/1 Introduction 397 7/2 Work 397 7/3 Equilibrium 401 7/4 Potential Energy and Stability 417 7/5 Chapter Review 433 APPENDICES APPENDIX A AREA MOMENTS OF INERTIA 441 A/1 Introduction 441 A/2 Definitions 442 A/3 Composite Areas 456 A/4 Products of Inertia and Rotation of Axes 464 APPENDIX B MASS MOMENTS OF INERTIA 477 APPENDIX C SELECTED TOPICS OF MATHEMATICS 479 C/1 Introduction 479 C/2 Plane Geometry 479 C/3 Solid Geometry 480 C/4 Algebra 480 C/5 Analytic Geometry 481 C/6 Trigonometry 481 C/7 Vector Operations 482 C/8 Series 485 C/9 Derivatives 485 C/10 Integrals 486 C/11 Newton’s Method for Solving Intractable Equations 489 C/12 Selected Techniques for Numerical Integration 491 APPENDIX D USEFUL TABLES 495 Table D/1 Physical Properties 495 Table D/2 Solar System Constants 496 Table D/3 Properties of Plane Figures 497 Table D/4 Properties of Homogeneous Solids 499 INDEX 503 PROBLEM ANSWERS 507