Physics, 13.11.2019 19:31 yatayjenings12
Three identical train cars, coupled together, are rolling east at speed v0. a fourth car traveling east at 2v0 catches up with the three and couples to make a four-car train. a moment later, the train cars hit a fifth car that was at rest on the tracks, and it couples to make a five-car train.
what is the speed of the five-car train?
express your answer in terms of v0
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