Just passed by a train with a hundred or so cargo crates. how do they start? I understand how they continue moving, but how do they overcome the inertia of starting it? It has to be like thousands of tons, and I can’t imagine a bunch of coal being able to start moving that. unless of course it can, in which ELI5
In: Engineering
Going from 0 to 5 mph takes basically the same energy as going from 30 to 35 mph. Point being that getting everything moving from standstill is basically the same force vs inertia problem as accelerating while already moving.
(Yes, there’s a small difference with air resistance)
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