[填空题]
A rotating merry-go-round makes oe lqx6(b3c)d ene complete revolution in 4.0 s (Fig. 8–38). 9k7rw. t* 65silo vaff(a) What is the linear speed tvwar ok 596s*.7ifflof a child seated 1.2 m from the center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center