P
A
B
C
D
E
F
G
H
I
L
PCE 219
Exam 2
November 14, 2007
NAME:__________________________
Problem 1 (30 points).
The truss shown below is composed of bars pinned together at points A
I. and supported by a foundation with a pinned connection at A and a trackroller at D.
The
applied load is P, and the length of each large bar is L (60 degree angles between bars.) (BF, CH
less than length L, and EG=GI=L)
a.
Determine the reaction forces at the foundation.
b.
Determine the force in bar BF.
c.
Draw an appropriate free body diagram(s) and
write the equations of equilibrium that can be
used to solve for the force BG.
(
You do not
need to solve the equations
, but you most show
sufficient number of equations that will give a a
unique solution to unknown forces introduced in
your FBD. (# equations = #unknowns)
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View Full DocumentProblem 2 (35 points.)
Formulate a set of equations that can be used to solve for the reaction
forces and the vertical displacement at the right end of the beam.
(Write the equations out,
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 Spring '09
 Coffin
 Force, 10 m, 2 L, ai., 60 degree, #unknowns

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