[单选题]
A 1.53-kg mass hangs on a r,nw5m5 xo-60h pnbkhlope wrapped iz z+:2gasau6aj8 a.h5 wi+h karound a frictionless disk pulley of mass 7.07 kg and radius 66.0 cm. What is the angular accelera+zau:z+haw ii a2khsa.56j g 8tion of the pulley?
A. $4.49 \; rad/s^2$
B. $7.98 \; rad/s^2$
C. $9.87 \; rad/s^2$
D. zero
Post time 2024-1-22 02:51:16