Estimate what is the speed of the five-car train

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Three identical train cars, coupled together, are rolling eastat 2 m/s. A fourth car traveling east at 4 m/s catchesup with the three and couples to make a four-car train. A momentlater, the train cars hit a fifth car that was at rest on thetracks, and it couples to make a five-car train.

A. What is the speed of the five-car train?

Reference no: EM13654452

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