Chapter 4
College Physics, 6th Edition
Wilson / Buffa / Lou
© 2007 Pearson Prentice Hall
This work is protected by United States copyright laws and is provided solely for
the use of instructors in teaching their courses and assessing student learning.
Dissemination or sale of any part of this work (including on the World Wide Web)
will destroy the integrity of the work and is not permitted. The work and materials
from it should never be made available to students except by instructors using
the accompanying text in their classes. All recipients of this work are expected to
abide by these restrictions and to honor the intended pedagogical purposes and
the needs of other instructors who rely on these materials.
Figure 4-2
Net force
Figure 4-3
Galileo’s experiment
Figure 4-4
A difference in inertia
Figure 4-5
Newton’s second law
Figure 4-6
The newton (N)
Figure 4-7
Newton’s second law and
free fall
Figure 4-8
Force and acceleration
Figure 4-9
An accelerated system
Figure 4-10
Off the straight and narrow
Figure 4-11
Distinctions between Newton’s second and third laws
Figure 4-12
Force pairs of Newton’s third law
Insight 4.2
Sailing Into the Wind – Tacking
Learn by Drawing 4-1
Forces on an Object on an Inclined Plane and Free-Body Diagrams
Figure 4-13
Finding force from
motional effects
Figure 4-15
Static translational equilibrium
Figure 4-16
On your toes
Figure 4-17
Friction and walking
Figure 4-19
Force of friction versus applied force
Table 4.1
Approximate Values for Coefficients of Static and Kinetic
Friction between Certain Surfaces
Figure 4-20
Forces of static and kinetic friction
Figure 4-21
Pulling at an angle: a closer look at the normal force
Figure 4-22
Free-body diagram
Figure 4-24
Air resistance and terminal velocity
Figure 4-26
An air-bubble level/accelerometer
Figure 4-27
Magic or physics?
Figure 4-28
Two applied forces
Figure 4-30
Correct label?
Figure 4-31
Away we go
Figure 4-32
Up a wall
Figure 4-33
Pulling a box
Figure 4-34
Mowing the lawn
Figure 4-35
Which way will they accelerate?
Figure 4-36
Atwood machine
Figure 4-37
Inclined Atwood machine
Figure 4-39
Racing tires versus passenger-car tires: safety
Figure 4-41
At what angle will it begin to slide?
Figure 4-42
Friction and motion
Figure 4-43
Take it away
Figure 4-44
Hoist it up