[填空题]
A rotating merry-go-round makes one complete revolution in 4.0 s (Fi +tek3ybm*31y5 5me mdqq vqp0g. 8–38). pl1rjdf:i :-:s5pl w x(a) What is the linear speed of sw 1pi5pjfll:rd -::xa child seated 1.2 m from the center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center