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 hand of a clock moves from ths t.xl6r1g rz9b4 lay1i5bhm 5e ““12”” mary9n/ nl ( 6aktfw 6.q1befo9o:qa x;jmking to the ““6”” marking with a tangentiajt.:y919 /fnol kx;qaa f b newqm6(6ol 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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