Introduction to Civil and Environmental Engineering
ENCE 100

Fall 2010
ENCE100
ASSIGNMENT 2
Report for the Social Enterprise Symposium
The social enterprise symposium we went to on March 31, 2011 was really useful for us.
Speakers used their own experiences in starting up social entrepreneurship to teach us how to
become suc
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Problem 2.43(b):
Problem 2.44(b):
Problem 2.45:
Problem 2.45: (cont)
Problem 2.47:
Problem 2.47: (cont)
Problem 10.13:
Problem 10.16*:
Problem 10.22*:
Problem 10.23*:
Problem 3.7:
Problem 3.9:
Problem 3.16:
Problem 3.18:
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Problem 6.8:
Problem 6.13:
Problem 6.13: (cont)
Problem 6.17:
Problem 6.20:
Problem 6.25:
Problem 6.27:
Problem 6.31:
Problem 6.35:
Problem 6.35: (cont)
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
H.04: The frame shown below is composed of three members (ABCD, CEF, and BE) that are
connected to each other through pins at B, C, and E. The frame is supported by a pin at A and a
roller at F. A horizontal force of 75 lb is applied at point D, as shown.
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
H.08: A uniform plate weighing 200 lb is supported in a horizontal position (xy plane) by a
single hinge at A and a cable BC. Find (a) ALL components of the reaction at the hinge, and (b)
the tension in the cable. (Hint: For this problem, the hinge at A
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
A nswer K ev f or O ld E xam P roblems E xam # 1
Vector P roblems:
1)
2)
3)
5)
6)
F ,:25.30 l b
0 : 4 2.44"
F" : 0
F y:  7 5.90 b

j
M4: e25.30 i  50.60  151.8 ) lbft
k
:  9 5. 94l b
: 6 3. 69l b
0 : 5 5.26"
F*
Fy
F ,: 9 5. 94l b
j
M3 : (  5 1t .7
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Answer Key for Old Exam Problems  Exam #2
Axial Loading & Material Property Problems:
1)
2)
3)
4)
5)
6)
7)
8)
AB = 4.244 ksi
AC = 16.98 ksi
AB = 0.02546 in
AC = 0.03396 in
dAC = 8.49 106 in
the lamp moves left
dAB = 14.13 106 in
PBC = 3.646 kN
No dBC
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Name: _
Section: _
Problem #1 (35 points): The two cylinders A and B are supported by a series of rings and
cables, as shown. For this configuration, both cylinders are in equilibrium, and cylinder A
weighs 50 lb.
(a) Draw the FBD(s) necessary to solve th
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Name: _
Section: _
Problem #1 (25 points): For the shaded area shown, calculate the location of the centroid ( x , y )
For a quarter circular area:
A=
4
r2
x=y=
4r
3
Name: _
Section: _
Problem #2 (25 points): For the shaded area shown, calculate the locat
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Name: _
Section: _
Problem #1 (25 points): The cantilever beam is fixed to the wall at the left end. It is subjected
to a uniform distributed load, a concentrated load, and a concentrated moment, at the locations
shown.
(a) Draw complete shear and bending
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Problem 3.41:
Problem 3.43:
Problem 3.45:
Problem 3.47:
Problem 4.1:
Problem 4.4:
Problems 4.7 & 4.9:
Problem 4.12:
Problem 4.15:
Problems 4.19 & 4.22:
Introduction to Civil and Environmental Engineering
ENCE 100

Spring 2014
Name: _
Section: _
Problem #1: A hollow cylindrical steel shaft (G = 75 GPa) is fixed at its base and subjected to a
torque T at the free end. The shaft has an outer radius of 45 mm and an inner radius of 30 mm.
Determine the maximum value of the torque i