p11_002.pdf

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Chapter 11 - 11.2
2. (a) The second hand of the smoothly running watch turns through 2 π radians during 60 s. Thus,
60 =0 . 105 rad / s .
(b) The minute hand of the smoothly running watch turns through 2 π radians during 3600 s. Thus,
ω =
2 π
3600 =1 . 75
×
10 − 3 rad / s .
(c) The hour hand of the smoothly running 12-hour watch turns through 2 π radians during 43200 s.
Thus,
2 π
43200 =1 . 45
ω =
×
10 − 4 rad / s .
ω = 2 π
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