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PROBLEM 10.48
Denoting by
s
µ
the coefficient of static friction between collar
C
and the
vertical rod, derive an expression for the magnitude of the largest couple
M
for which equilibrium is maintained in the position shown. Explain
what happens if
tan
s
θ
≥
.
SOLUTION
Member
BC
: Have
cos
B
xl
=
sin
B
δ
θδθ
=−
(1)
and
sin
C
yl
=
cos
C
=
(2)
Member
AB
: Have
1
2
B
x
l
δφ
=
Substituting from Equation (1),
1
sin
2
ll
−=
or
2sin
φθ
= −
(3)
Free body of rod
BC
For
max
,
M
motion of collar
C
impends upward
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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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