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【单选题】
The two homogeneous rings in Figs. (a) and (d) and the two homogeneous disks in Figs. (b) and (c) have the same weight【图片】 and radius 【图片】. Force【图片】 is applied in Figs. (a) and (b). A moment【图片】 is applied in Fig. (c). A block with weight【图片】 is suspended in Fig. (d). Which statement is correct?【图片】A.
The angular acceleration of the ring in Fig. (a) is equal to that of the disk in Fig. (b).
B.
The angular acceleration of the ring in Fig. (a) is equal to that of the disk in Fig. (c).
C.
The angular acceleration of the ring in Fig. (a) is equal to that of the ring in Fig. (d).
D.
The angular acceleration of the disk in Fig. (b) is equal to that of the ring in Fig. (d).
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