Modern oil tankers weigh over a half-million tons and have lengths of up to one-fourth mile. Such massive ships require a distance of 4.8 km (about 3.0 mi) and a time of 22 min to come to a stop from a top speed of 26 km/h.

(a) What is the magnitude of such a ship's average acceleration in m/s2 in coming to a stop?

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