A Locomotive Is Pulling 9 Freight Cars,each of Which Is $$37,000 \mathrm {~kg} \text {, }$$

Short Answer

A locomotive is pulling 9 freight cars,each of which is loaded with the same amount of mass.The mass of each loaded car is $$37,000 \mathrm {~kg} \text {, }$$ and we can neglect friction forces exerted on these 9 cars.If the train is accelerating forward at $$0.81 \mathrm {~m} / \mathrm { s } ^ { 2 }$$ on a level track,what is the tension force that the coupling between the second and third cars exerts on them? (The car nearest the locomotive is counted as the first car.)