[填空题]
A rotating merry-go-round make1 x6 cx:8daxgii +(pbbs one completem.o1 1en ,mlw1c:yac p-olwk 0 revolution in 4.0 s (Fig. 8–38). (a) What is the linear speed of a child seated 1.2 m from the center? 0mcp -oyw11,k c:m 1l .lnaowe $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center