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PROBLEM 10.97
Bars
AB
and
BC
, each of length
l
and of negligible weight, are attached to
two springs, each of constant
k
. The springs are undeformed and the
system is in equilibrium when
12
0.
θθ
=
=
Determine the range of
values of
P
for which the equilibrium position is stable.
SOLUTION
Have
sin
B
xl
θ
=
sin
sin
=+
C
l
cos
cos
C
yl
l
22
11
CBC
VP
y
k
x
k
x
+
or
()
2
1
1
cos
cos
sin
sin
sin
2
+
+
+
l
k
l
For small values of
1
and
2
:
2 2
1
1
2
2
sin
,
sin
cos
1
cos
1
≈≈≈
−
≈
−
Then
2
2
1
2
=−
+
−
+
+
+
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This note was uploaded on 07/11/2011 for the course EGM 2511 taught by Professor Jenkins during the Spring '08 term at University of Florida.
 Spring '08
 Jenkins
 Statics

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