[填空题]
A rotating merry-go-round maktir/ v u+1e+oles one complete revolution in 4.p*,l )(d u9-klqcy iaj0 s (Fig. 8–38). (a) What is the linear speed of akc-9)pylila* ,jdu (q child seated 1.2 m from the center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center