[填空题]
A rotating merry-go-round makes one complete revolutiofpk)-fo01cr kcn u5b nf*x5x*n inx yi;07 yzeumw2q yi4mxhm/9. 4.0 s (Fig. 8–38). (a) What is the linear speed of a child seat 9 4w ym0myi;zh7qyu2ixm ./xeed 1.2 m from the center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center