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A 1.50 T train car is traveling at 36.0 km/h. After being loaded with cargo equal...

A 1.50 T train car is traveling at 36.0 km/h. After being loaded with cargo equal to half of the car’s mass, the train pulls the car away at twice its original speed. By how much has the train car’s kinetic energy changed? Note that 1T = 1000 kg.

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