This preview shows page 1. Sign up to view the full content.
For
s
I
I
>
,
11
0
s
II
−>
and
α
decreases with time.
9.16
(a) From table 8.3.1…
2
2
s
ma
I
=
about the symmetry (spin) axis.
2
4
cm disk
a
Im
=
about an axis through
the center of mass of the disk and
⊥
to the spin axis. From the parallel
axis theorem, equation 8.3.21, …
S
G
a / 2
a
45
o
z
y
x
2
2
42
disk
ma
a
=+
about the pivot
point.
2
23
rod
ma
I
=
moment of inertia of
the rod about the pivot point. Thus …
2
22
2
2
422
3
3
disc
rod
ma
a
m
a
I
m
m
=+=
+
+
=
a
From equation 9.7.10,
()
1
2
4c
o
s
2c
o
s
ss
IS
Mg
l
I
I
θ
φ
+−
=
±
1
2
2
2
14
2cos
Mgl
SS
I
=±
−
±
c
o
s
2
2
3
2
2
4
3
s
ma
I
ma
I
==
,
1
cos
cos45
2
D
1
2
99
2
88
0
3
m
Ml
cm
ma
Ia
−
+
=
1
2
2
2
2
1
21
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 01/06/2012 for the course PHYSICS 4360C taught by Professor Johnanderson during the Fall '11 term at UNF.
 Fall '11
 JohnAnderson
 Center Of Mass, Mass, Work

Click to edit the document details