Answer:
ω = 0.313 rad/s
Step-by-step explanation:
D = 200 m ⇒ R = D / 2 = (200 m / 2) = 100 m
ac = 9.8 m/s²
The following equation can be used
ac = ω²*R ⇒ ω = √(ac / R)
then we insert the values in the last formula
ω = √(9.8 m/s² / 100 m) = 0.313 rad/s