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(b) The rotational kinetic energy is
2
rot
rot
2
2
12
(
2
0
J
)
=
2.4 rad/s
27
k
g
m
K
KI
I
ωω
=
¡
==
⋅
The linear speed of the end
B
is given by
(2.4 rad/s)(3.00 m) 7.2 m/s
BA
B
vr
ω
=
, where
r
AB
is the distance between
A
and
B
.
(c) The maximum angle
θ
is attained when all the rotational kinetic energy is transformed
into potential energy. Moving from the vertical position (
θ
= 0) to the maximum angle
,
the center of mass is elevated by
(1 cos )
AC
yd
Δ=
−
, where
d
AC
= 1.00 m is the distance
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 Spring '08
 Any
 Physics, Energy, Inertia, Kinetic Energy

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