[填空题]
A rotating merry-go-round makes t3 ./,th7o3j rdwuopm one complete revolution in 45-r q8jflyee4pz:(u sdpo z --.0 s (Fig. 8–38). (a) What is the linear speed of a child seated 1.2 m from th8p :4 -zpys-red-lf q5uoz (jee center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center