Emma52658 Emma52658

03-08-2016
Physics

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a railroad car with a mass of 30,000 kg is moving at 2.0 m/s when it runs into an at-rest freight car with an equal mass. the cara lock together. what is their final velocity?
A. 2.0 m/s
B. 0.5 m/s
C. 60,000 kg-m/s
D. 1.0 m/s

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Distasion Distasion

03-08-2016

D. It is the same energy but now pushing twice as much, so it would be half as fast so 1 m/s

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