A Locomotive Is Pulling 9 Freight Cars, Each of Which

Short Answer

A locomotive is pulling 9 freight cars, each of which is loaded with the same weight. The
mass of each loaded car is 37,000 kg, and we can neglect friction on these 9 cars. If the train
is accelerating forward at 0.81 m/s² on a level track, what is the tension in the coupling
between the second and third cars? (The car nearest the locomotive is counted as the first
car.)