The two homogeneous rings in Figs. (a) and (d) and the two homogeneous disks in Figs. (b) and (c) have the same weightand radius. Forceis applied in Figs. (a) and (b). A momentis applied in Fig. (c). A block with weightis suspended in Fig. (d). Which statement is correct?
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).