Statics
Chapter 3 - Equilibrium
Newtons First Law of Motion
A particle remains at rest or continues to
move with uniform velocity if there is no
unbalanced force acting on it.
Leaving out motion (in bold)
An object at rest remains at rest unless
acted upo

Beyond the Class 3.2
4/19/13
The article Students Make Gains in Testing on Science,1 by Duff Wilson appeared in
The New York Times on May 10, 2012. The results from a national standardized test given to
eighth graders in 2012 and 2011 were compared as par

IFC Fall 2013 Recruitment Proposal
K-Week (8/24-8/31)
Overall Goal: Reach freshmen that are either undecided about whether or not to
join a fraternity and reach freshmen that have never considered joining a fraternity.
Saturday 8/24
Campus Ruckus
Goal: Pr

Statics
EXAM 1 REVIEW
Resolve the force FB
into components
along the x- and uaxes. =80
80
= 2 kN
80
= 2 kN
Resolve the force FB
into components
along the x- and yaxes.
80
= 2 kN
80
= 2 kN
Determine the magnitude
and direction of the
resultant of FA and FB

EM221 - Statics
Exam 2 Review
A former student of mechanic wishes to weigh himself
but has access only to a scale A with capacity limited
to 100 lb and a small 20 lb spring dynamometer B.
With the rig shown he discovers
that when he exerts pull on the
rop

EM221 - Statics
Final Exam Review
COURSE OUTCOMES
Students will be able to:
Perform necessary vector operations.
Determine moment of a force in both 2D and 3D
systems.
Determine resultants of force-couple systems and
distributed loadings.
Identify and

Statics
Appendix A
Moments of Inertia
Recall
M y Wx
xdW
xdW
x
W
Center of Gravity
If gravity, density and
thickness constant
Q=
xdA
First Moment of Area
xdA
x
A
Centroid of an Area
First Moment of Area
A_02
Q
xdA
Second Moment of Area
I y 2 dA
x
Moment

Statics
Chapter 3 Part 2
z
As part of a check on its
design, a lower A-arm is
supported by bearings
x
at A and B and
subjected to the pair of
900-N forces at C and D. The
suspension spring, not shown for
clarity, exerts a force Fs at E as
shown, where E i

Chapter 4
Structures Frames & Machines
Vector Mechanics for Engineers Statics, 8th edition, by Beer, Johnston, and Eisenberg, McGraw Hill,2007, p.285.
Determine the
magnitude of the
force supported
by the pin at C.
Determine the
magnitude of the
pin react

Statics
Chapter 5a
Center of Gravity
M y Wx
xdW
xdW
x
W
M x Wy
ydW
M y Wx
M y
xdW
ydW
y
z
W
zdW
W
If gravity is constant, W=mg and dW=g(dm)
xdW
x
xgdm xdm
mg
W
m
and
y
ydm
m
zdm
z
CENTER OF MASS
m
If density is constant, =m/Vor m=Vand dm=(dV)
xdm
x
m
x

Chapter 4
Structures Trusses
Method of joints
Vector Mechanics for Engineers Statics, 8th edition, by Beer, Johnston, and Eisenberg, McGraw Hill,2007, p.285.
Newtons Third Law
The forces of action and reaction
between interacting bodies are
equal in magni

EM221 Statics
Chapter 5b
05_18
w
L
05_20
05_20
05_20
P_05_98
Determine the reactions at A and B for the
loaded beam.
P_05_98
P_05_98
P_05_98
P_05_98
P_05_98
P_05_105
Determine the support reactions at A for
the beam subjected to the load
combination shown

My report is on the article, "Demanding Physical Work Associated With an
Increased Risk of Cardiovascular Disease". This article appeared in Sciencedaily.com
and has no credited author, instead drawing from two sources, both of those present at the
2013 E

Extra Credit Assignment
a) Descriptive Statistics
Mean
Standard
Deviation
Sample Variance
Median
Mode
Minimum
Maximum
Range
Coefficient of
Variation (St.
D/Mean)
Mean
Standard
Deviation
Sample Variance
Median
Mode
Minimum
Maximum
Range
Coefficient of
Vari