Answer:
8.4 rad/min
Explanation:
The average angular speed is equal to the total angular distance divided by the total time. The angular distance is the number of radians traveled. One lap or revolution is equal to 2π radians. Therefore, the total angular distance is:
120 laps × (2π rad/lap) = 240π radians
The average angular speed is:
(240π rad) / (1.5 h) ≈ 503 rad/h
Or, in radians per minute:
503 rad/h × (1 h / 60 min) ≈ 8.38 rad/min
Rounded to two significant figures, the average angular speed is 8.4 rad/min.
