Fisica

PROBLEM WORKBOOK

Holt Physics
Problem Workbook
This workbook contains additional worked-out samples and practice problems for each of the problem types from the Holt Physics text. Contributing Writers Boris M. Korsunsky Physics Instructor Science Department Northfield Mount Hermon School Northfield, MA Angela Berenstein Science Writer Urbana, IL John Stokes Science Writer Socorro, NMCover Photo: Lawrence Manning/CORBIS Cover Design: Jason Wilson Copyright © by Holt, Rinehart and Winston All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Teachers using HOLT PHYSICSmay photocopy blackline masters in complete pages in sufficient quantities for classroom use only and not for resale. Printed in the United States of America ISBN 0-03-057337-8 1 2 3 4 5 6 095 05 04 03 02 01

Contents
Section
Sample and Practice 1A Sample and Practice 2A Sample and Practice 2B Sample and Practice 2C Sample and Practice 2D Sample and Practice 2E Sample and Practice 2F Sampleand Practice 3A Sample and Practice 3B Sample and Practice 3C Sample and Practice 3D Sample and Practice 3E Sample and Practice 3F Sample and Practice 4A Sample and Practice 4B Sample and Practice 4C Sample and Practice 4D Sample and Practice 5A
Copyright © by Holt, Rinehart and Winston. All rights reserved.

Title

Page

Metric Prefixes . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 1 Average Velocity and Displacement
.......................3

Average Acceleration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Displacement with Constant Acceleration. . . . . . . . . . . . . . . . 7 Velocity and Displacement with Constant Acceleration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . 9 Final Velocity After Any Displacement Falling Object
. . . . . . . . . . . . . . . . . . 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Finding Resultant Magnitude and Direction . . . . . . . . . . . 16 Resolving Vectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Adding Vectors Algebraically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Projectiles Launched Horizontally. . . . . . . . . . . . . . . . . . . . . . . 22 Projectiles Launched at an Angle
. . . . . . . . . . . . . . . . . . . . . . . . 24

Relative Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Net External Force . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Newton’s Second Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Coefficients of Friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Overcoming Friction Work
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

. . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Sample and Practice 5B Sample and Practice 5C Sample and Practice 5D Sample and Practice 5E Sample and Practice 5F Sample and Practice 6A Sample and Practice 6B Sample and Practice 6C Sample and Practice 6D Sample and Practice 6E Sample and Practice 6F Sample and Practice 6G Sample and Practice 7ASample and Practice 7B

Kinetic Energy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Work-Kinetic Energy Theorem . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Potential Energy
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Conservation of Mechanical Energy . . . . . . . . . . . . . . . . . . . ....