A truck convoy is traveling at 20.9 m/s and trucks arrive at their destination every 4 minutes. A person on a moped is traveling along the same road, at 4.33 m/s. With what frequency (in min1) do the trucks pass the moped? The trucks move at a steady pace, but the moped rider slows to 1.56 m/s. Now how often (in min1) do the trucks pass the moped