PROBLEM 10.76
A block of mass
m
is hung from member
AB
as shown. Neglecting the
mass of
AB
and knowing that the spring is unstretched when
20 ,
θ
=°
determine the value of
corresponding to equilibrium when
3 kg.
m
=
State whether the equilibrium is stable, unstable, or neutral.
SOLUTION
Using the general results of Problem 10.76 and noting that now
0
3 kg,
and
20
m
==
°
we have
Equilibrium
()
2
0
0:
sin
0
AB
dV
kr
mgL
d
θθ
=−
−
=
(
)
2
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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