Physics (Part 1 - Part 3)

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| Preface
Integration with Enhanced WebAssign
The textbook’s tight integration with Enhanced WebAssign content facilitates an
online learning environment that helps students improve their problem-solving
skills and gives them a variety of tools to meet their individual learning styles. New
to this edition, Master It tutorials help students solve problems by having them
work through a stepped-out solution. Problems with Master It tutorials are indicated
in each chapter’s problem set with a icon. In addition, Watch It solution
videos explain fundamental problem-solving strategies to help students step
through selected problems. The problems most often assigned in Enhanced Web-
Assign (shaded in blue) have feedback to address student misconceptions, helping
students avoid common pitfalls.
Thorough Revision of Artwork
Every piece of artwork in the ninth edition was revised in a new and modern style
that helps express the physics principles at work in a clearer and more precise fashion.
Every piece of art was also revised to make certain that the physical situations
presented corresponded exactly to the text discussion at hand.
Also added for this edition is a new feature for many pieces of art: “guidance
labels” that point out important features of the figure and guide students through
figures without having to go back-and-forth from the figure legend to the figure
itself. This format also helps those students who are visual learners. An example of
this kind of figure appears below.
Active Figure 3.14
The parabolic trajectory of a particle
that leaves the origin with a velocity
of S v0. Note that S
v changes with time.
However, the x-component of the
velocity, v x
, remains constant in time,
equal to its initial velocity, v 0x
. Also,
v y
5 0 at the peak of the trajectory,
but the acceleration is always equal
to the free-fall acceleration and acts
vertically downward.
v 0y
y
The y-component of
velocity is zero at the
peak of the path.
S
v 0
v y
u 0
v 0x
S
v
u
v 0x
v y 0
v 0x
v y
S
g
v 0x
u
S
v
The x-component of
velocity remains
constant in time.
v 0x
u 0
x
v 0y
S
v
Content Changes
The text has been carefully edited to improve clarity of presentation and precision
of language. We hope that the result is a book both accurate and enjoyable to
read. Although the overall content and organization of the textbook are similar to
the eighth edition, a few changes were implemented.
■
■
Chapter 1 (Introduction) The discussion of accuracy of measurements has
been improved and Example 1.3, illustrating the use of significant figures, has
been greatly expanded.
Chapter 2 (Motion in One Dimension) For this edition the concept of “path
length,” often called (inaccurately) “total distance,” was introduced, as were
the conceptual reasons why such a definition (used in mathematics) is important.
The general discussion of the concept was also reworked for enhanced
clarity. Finally, a new part to Example 2.4 better illustrates the concept of average
speed.
■ Chapter 3 (Vectors and Two-Dimensional Motion) New Figures 3.16 and 3.17
explain and illustrate the independence of horizontal and vertical motion. A
new part to Example 3.5 shows how to find the direction of motion given the
two components of the velocity vector, while a new part added to Example 3.10
better shows how to handle relative motion in one dimension.
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