[填空题]
A rotating merry-go-round makes one comple2;t h** 4 kwypxsq:mbste revolution in 4.0 s (F4+tay* z(a0kgoov3dr ig. 8–38). (a) What is the linear speed of a cz* g(0avd 3or+ a4oytkhild seated 1.2 m from the center? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center