[填空题]
A rotating merry-go-round makes one complete revhyic hik68 (*tolution in 4.0wv3m 8 hre6e8t 8nk0ki s (Fig. 8–38). (a) What is the linear spere i e368mk w8t0vk8hned of a child seated 1.2 m from the center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center