49. (a) We use the kinematic equation
ω
α
=+
0
t
, where
0
is the initial angular
velocity,
is the final angular velocity,
is the angular acceleration, and
t
is the time.
This gives
=
−
=
×
=
−
0
3
2
620
220 10
28 2
t
.
..
rad / s
s
rad / s
(b) If
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Acceleration

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