KI
I
I
II
I
f
i
i
=+
+
F
H
G
I
K
J
=
1
2
2
2
1
6
11
1
2
2
b
g
ω
.
Therefore, the fraction lost,
KKK
if
i
−
di
is
2
2
/6
2
1
1
0.667.
/2 3
f
i
ii
K
I
−=
−
=
=
45. (a) No external torques act on the system consisting of the two wheels, so its total
angular momentum is conserved. Let
I
1
be the rotational inertia of the wheel that is
originally spinning at
i
bg
and
I
2
be the rotational inertia of the wheel that is initially at
rest. Then
I
2
ωω
b
g
and
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 Spring '08
 Any
 Physics, Angular Momentum, Inertia, Momentum

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