e
PROBLEM
I (20 points)
(.Y.3.
r3. 23)
NorE:
THrs rs A
gD
'R.BLEM
consicler
the c:able
and rocr
s;,s
tem
in Figure
l.
(a) Nea,tly
draw a freebocrv
cliagram
for each c::rble
and the frame. F is a
vector.
(b) sum the forces ancr moments
for the frame, resurting
in a systenr
of 6 equations
ancl 6 unknowns.
In these equations,
there should only b_e
6unknowns.
(D"
1:t^:olve
the equations.)
Iaentify
the 6 unknowns.
(NOtC:
SET UP YOU CAN LEAVE dOIUTIOIVS
rrV rbNIrS
OF CROSS
PRODUCTS)
Hint: Use vector form; do not find any angles.
!/
(.\'2,Y2.22)
\r,
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PROBLEM 2 (30 points)
L,
I
vt
L_>
X
\r.l
Consider
the truss system
in Figure 2.
(a) Neatly draw a freebody diajram for the entire system (do
not break
it rrp,yet).
(b) Determine the reaction forces at the supports.
(c) Draw the freebodydiagram for each
joint. please
use
the labelsgiven
on.the test for the joints,
for example a, and ea are
the reactions at point a"
and truss force
in member ab is f6
/ r\
n
_
(o1 tor each.;ornt,
sum (express
the equations)
in the x and y directions.
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 Spring '08
 PAPADOPOULOS
 Trigraph, Nore, reebody d iagram, nd r ocr, ach c omponent

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