Final answer:
The angular velocity (ω) is 2π/45 radians per second.
Step-by-step explanation:
To find the value of the missing variable ω, we can rearrange the formula s = rωt to solve for ω. Divide both sides of the equation by rt to isolate ω. Thus ω = s / rt. Plug in the given values for s, r, and t to calculate the value of ω. In this case, ω = (2π/3 km) / (3 km * 5 sec) = 2π/45 radians per second.