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A train car with mass 14000 kg and another with a mass of 24000 kg have a spring to soften the collision that occurs when the two are coupled.
The lighter car is moving at 1.8 m/s and it runs into the other car, that is at rest. When the spring is FULLY compressed, the two cars are linked.
The spring constant is 53000 N/m.
What is the compression of the spring?
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