本题目来源于试卷: Space Time & Motion A.4 Rotational Mechanics，类别为 IB物理学
[单选题]
The tip of the seconds h gthf*xn j7a9r)b.d bqpcov9**+v 6 sland of a w9 dhlpa2ntqu qrw73w5)i3d3 clock moves from the ““12”” marking to the ““6”” marking with a tangential speed of 239 3pqwqlu3 ia57 )nwdtw2 drh$cms^{−1}$.
Which of the following is correct about the angular speed and the centripetal acceleration?
A. Angular speed is $\frac{π}{60}\,rad\,s^{−1}$ ; Centripetal acceleration is $\frac{π}{30}\,cm\,s^{−2}$
B. Angular speed is $\frac{π}{60}\,rad\,s^{−1}$ ; Centripetal acceleration is $\frac{π}{15}\,cm\,s^{−2}$
C. Angular speed is $\frac{π}{30}\,rad\,s^{−1}$ ; Centripetal acceleration is $\frac{π}{30}\,cm\,s^{−2}$
D. Angular speed is $\frac{π}{30}\,rad\,s^{−1}$ ; Centripetal acceleration is $\frac{π}{15}\,cm\,s^{−2}$
参考答案: D
本题详细解析:
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