Louisiana State University
Department of Civil & Environmental Engineering
Spring 2016 CE 2450 (Statics) Quiz # 2 (3/1/2016)
Name:_
ID #:_
Section #: 3
CHOOSE THE CORRECT ANSWER ASSUMING COUNTER CLOCKWISE IS POSITIVE
1. The moment about point A for the fo
CE 2450 Statics Exam #3 Fall 2012
Problem #1
3
1
2
a)
No.
1
2
3
sum
A
18
6
-6.28
17.72
x-bar
y-bar
b) NA
c) NA
Problem #2 NA
MC #1 NA
MC #2 - c
MC #3 NA
MC #4 NA
x~
y~
3
7.33
3
4.47
1.10
1.5
1
2.151174
inch
inch
A*x~
54
44
-18.85
79.15
B*y~
27
6
-13.52
19
Final Exam Study Guide
Fluid Pressure
In the picture shown, a wall is used to dam
water (w = 62.4 lb/=3) that is currently at a
depth of 10 =. At the boEom of the wall there is
a 3 = wide L shaped gate,
Final Exam
Study Guide
Trusses:
Method of Joints (Chapter 6.1 6.3)
Exam #2
Exam #2
Exam #3
Exam #3
Exam #3
Spring 2012
Summer 2012
Fall 2012
Spring 2013
Fall 2013
Problem #1(a)
Problem #2(c)
Problem #2(c)
Problem #1(d)
Problem #1(b)
Method of Sections (Ch
9.12.
Solution:
=
=
=
2
=
2
4
0
2 4
0 2 2
=
2 5
]
[
10 4
0
3
[ 2 ]
3
0
=
3
10
Ans.
9.21.
Solution:
Area and moment arm: the area of the differential
element shown shaded in the Figure is
2
= = (4 1/2 ) = ( 8 1/2 + 16)
and its centroid is
8-66.
Solution:
FBD:
FBD of B
FBD of A
From FBD of B:
+ = 0,
+ = 0,
sin 15 0.1 cos 15 = 0
(1)
cos 15 + 0.1 sin 15 + 0.2 3000 = 0
(2)
Solving Eqs. (1) and (2) yields:
= 2929.0 lb,
= 475.2 lb
From FBD of A:
+ = 0,
+ = 0,
292.9 sin 15 2929.0 cos 15 = 0,
10.25.
Solution:
Composite Parts: the composite area can be subdivided into three segments as shown in the
figure. The perpendicular distance measured from the centroid of teach segment to the x axis is
also indicated
Moment of inertia: the moment of iner
8-31.
Solution:
FBD:
Block A
Block B
Equations of equilibrium: since neither block A nor block B is moving yet, the spring force
= 0. From FBD of block A,
+ = 0; 10 sin = 0
+ = 0; 10 cos = 0
(1)
(2)
+ = 0; 6 sin = 0
+ = 0; 6 cos = 0
(3)
(4)
From FBD of b
‘/
F., Louisiana State University
H Department of Civil & Environmental Engineering
Spring 2016 —— CE 2450 (Statics) — EXAM # 1 (2/15/2016)
Write your name, 89 #, and section number on your Bluebook, Scantron Sheet, and test paper.
No questions about the
F2
52:1. Determine ihe magnitude of the
acting on the screw a
clockwise from the x axis.
resuitant force
ya and its diraciion measured 2» 1"?
227. The resultant FR of the two forces acting on the log is
to be directed alcng the positive x axis and hav