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23. (a) Converting from hours to seconds, we find the angular velocity (assuming it is
positive) from Eq. 1018:
()
4
3
3
2.90 10 km/h 1.000 h /3600 s
2.50 10
rad/s.
3.22 10 km
v
r
ω
−
×
==
=
×
×
(b) The radial (or centripetal) acceleration is computed according to Eq. 1023:
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 Spring '08
 Any
 Physics, Acceleration

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