What is the magnitude of the final velocity of two railroad

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A railroad car with a mass of 15 400 kg collides and couples with a second car of mass 18 500 kg that is initially at rest. The first car is moving with a speed of 7 m/s prior to the collision.

If external forces can be ignored, what is the magnitude of the final velocity of the two railroad cars after they couple?

Reference no: EM132062373

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