The Method of Joints
Procedure for Analysis
The following procedure provides a typical means for analyzing a truss using the
method of joints.
Draw the fbd of a joint having at least one known force and at most two
unknown forces. (If this joint is at on
Engineering 9 Statics
Exam #3 Chapters 6 & 7
May 23, 2012
This is a take/home exam. You may use your textbook and your course notes, but no other materials.
The exam is due at the start of class on Wednesday, May 30. Please work carefully and show all
nec
The Method of Sections
The force in almost any desired member may be found directly from an analysis
of a section which has cut that member. Thus, it is not necessary to proceed
with the calculation from joint to joint until the member in question has bee
Example: Replace the distributed loading with an equivalent resultant force and specify its
location on the beam measured from point A.
L
The resultant is: Ry
= - w0 sin
x
2L
( )
dx = w0
2L
( )
cos
x
2L
( )
2w0L
|L
= cos
|0
()
2
0
=
-2w0L
2w0L
=
L
The re
Engineering 9 Statics
Exam #1 Chapters 2 & 3
Spring 2013
This exam is open book, but closed notes. Please work carefully and show all necessary diagrams. NEATNESS
COUNTS. Round your answers to 3 significant figures.
Engineering 9 Statics
Sample Test for Exam #2
Chapters 4 & 5
April, 2012
Solutions and/or Answers
This exam is open book, but closed notes. Please work carefully and show all necessary diagrams.
NEATNESS COUNTS. Round your answers to 3 significant figures
Engineering 9 Statics
Sample Final Exam
This exam is open book, but closed notes. Please work carefully and show all
necessary diagrams. Show all of your work. NEATNESS COUNTS. Round
your answers to 3 significant figures.
Please box your answers. If a pro
Engineering 9 Statics
Sample Test #1 Chapters 2 & 3
ANSWERS (not solutions)
not guaranteed to be correct
Spring 2013
1.
The tension in cable AB is 201 lb. The tension in cable BC is 322 lb.
2.
The tension in cable AB is 497 N. The tension in cable BC is 3
Here are the answers to problem 8-70 from the
textbook.
For the first situation, where all of the blocks slide together,
we obtained the result P = 625 lb
For the second situation, where block A remains stationary while block
B moves up and block C moves