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 cloc0jzj vt9*.vkiy9, t86)cupbkwvj drii :j b..k moves from the ““12”+fc4otr-0 g 3iokg hh) ,.s7ryce,vorkpj/. m” marking to the ““6”” marking with a tangential speed of g.mk/kcc. )fe vjrhh4- py0osg,o+o,37trr i2$cms^{−1}$.
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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