CENGAGE Learning Mechanics of Materials.Seventh Edition 2009 Cengage Learning James M.Gere and Barry J.Goodno ALL RIGHTS RESERVED.No part of this work covered by the copyright herein may be Director,Global Engineering Program:Chris Carson reproduced,transmitted,stored or used in any form or by any means graphic,electronic, Senior Developmental Editor:Hilda Gowans or mechanical,including but not limited to photocopying,recording,scanning,digitizing. taping,Web distribution,information networks,or information storage and retrieval Permissions:Nicola Winstanley systems,except as permitted under Section 107 or 108 of the 1976 United States Production Service:RPK Editorial Services,Inc Copyright Act,without the prior written permission of the publisher. Copy Editor:Rose Kernan Proofreader:Martha McMaster For product information and technology assistance,contact us at Cengage Learning Customer Sales Support,1-800-354-9706 Indexer:Shelly Gerger-Knechtl For permission to use material from this text or product,submit all requests online at Creative Director:Angela Cluer cengage.com/permissions Text Designer:Peter Papayanakis Further permissions questions can be emailed to permissionrequest@cengage.com Cover Designer:Andrew Adams Cover Image:Guggenheim Bilbao Photo graficart.net/Alamy, Library of Congress Control Number:2008923451 Lee Chin Crystal Building Photo Courtesy of Alan I5BN-13:978-0-534-55397-5 Marsh/First Light 15BN-10:0-534-55397-4 Compositor:Integra Printer:Quebecor World Cengage Learning 1120 Birchmount Road Toronto ON MIK 5G4 Canada Cengage Learning is a leading provider of customized learning solutions with office locations around the globe,including Singapore,the United Kingdom,Australia,Mexico, Brazil,and Japan.Locate your local office at:international.cengage.com/region Cengage Learning products are represented in Canada by Nelson Education Ltd. For your course and learning solutions,visit academic.cengage.com Purchase any of our products at your local college store or at our preferred online store www.ichapters.com Printed in the United States of America 123456711100908Mechanics of Materials, Seventh Edition James M. Gere and Barry J. Goodno Director, Global Engineering Program: Chris Carson Senior Developmental Editor: Hilda Gowans Permissions: Nicola Winstanley Production Service: RPK Editorial Services, Inc Copy Editor: Rose Kernan Proofreader: Martha McMaster Indexer: Shelly Gerger-Knechtl Creative Director: Angela Cluer Text Designer: Peter Papayanakis Cover Designer: Andrew Adams Cover Image: Guggenheim Bilbao Photo © graficart.net/Alamy; Lee Chin Crystal Building Photo Courtesy of Alan Marsh/First Light Compositor: Integra Printer: Quebecor World © 2009 Cengage Learning ALL RIGHTS RESERVED. No part of this work covered by the copyright herein may be reproduced, transmitted, stored or used in any form or by any means graphic, electronic, or mechanical, including but not limited to photocopying, recording, scanning, digitizing, taping, Web distribution, information networks, or information storage and retrieval systems, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act, without the prior written permission of the publisher. For product information and technology assistance, contact us at Cengage Learning Customer & Sales Support, 1-800-354-9706 For permission to use material from this text or product, submit all requests online at cengage.com/permissions Further permissions questions can be emailed to permissionrequest@cengage.com Library of Congress Control Number: 2008923451 ISBN-13: 978-0-534-55397-5 ISBN-10: 0-534-55397-4 Cengage Learning 1120 Birchmount Road Toronto ON M1K 5G4 Canada Cengage Learning is a leading provider of customized learning solutions with office locations around the globe, including Singapore, the United Kingdom, Australia, Mexico, Brazil, and Japan. Locate your local office at: international.cengage.com/region Cengage Learning products are represented in Canada by Nelson Education Ltd. For your course and learning solutions, visit academic.cengage.com Purchase any of our products at your local college store or at our preferred online store www.ichapters.com Printed in the United States of America 1 2 3 4 5 6 7 11 10 09 08