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 secondn+drtc58bs : us sd .1(rsh1kyl .leu ry nv0*5vk **ayihand of a clock moves from the ““12”” marking to the ““6”” maryky vv1uedrn*0yr*s. l.51s(k* a l hiking with a tangential speed of 2$cms^{−1}$.
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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