[填空题]
A rotating merry-go-round c5q) swl6vdhm8ch*jk;r : ;ndm.ox k 6-aolc)oakes one complete revolution in 4.0 s (Fig. 8–38). (a) What is the linear speed of ax- ooa).o6kl c child seated 1.2 m from the center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center