Assume you can hook every locomotive and car Union Pacific owns up into a single gigantic freight train. Safety and laws aside, would it work?
In: Physics
As others have stated, adding a engine every few cars would allow a near infinite length (which would be similar to an infinite amount of small trains that happened to be connected together)
If we are talking about a single freight engine- (which we give infinite pulling power) how many cars can you add to it? Then we would be limited by the weight a train coupler can hold. 725,000 lbs. Then math that out vs the Rolling friction of a train track times the weight of the cars.
I’d say 480 cars(7.4km), not quite sure on the formula.
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