PROBLEM 9.96
Using Mohr’s circle, determine the moments of inertia and the product of
inertia of the L5
×
3
×
1
2
in. angle cross section of Problem 9.78 with
respect to new centroidal axes obtained by rotating the
x
and
y
axes
through
o
30 counterclockwise.
SOLUTION
Have
4
9.45 in
x
I
=
4
2.58 in
y
I
=
From Problem 9.78
4
2.8125 in
xy
I
=
Now
4
ave
6.015 in
2
xy
II
I
+
==
and
()
2
2
2
xy
RI
−
=+
4
4.43952 in
=
Then
( )
1
22
.8125
2t
a
n
3
9
.
3
1
9.45
2.58
m
θ
−
−
=
=−
°
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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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