[填空题]
A rotating merry-go-rypm0.5ocvl e z r(jv ct:(9qac 3vi*0m74 x ob blg4jli;f71paound makes one complete revolution in 4.0 s (Fig. 8–38). (a) What is the linear speed of a child seated 1.2 m from the cent4xb 7fpjaiog1lbl;74er? $m/s$ (b) What is her acceleration (give components)? $m/s^2$ the center