In a railroad switchyard a 50 ton freight car is sent at 74, Physics

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In a railroad switchyard a 50 ton freight car is sent at 74

In a railroad switchyard, a 50 ton freight car is sent at 7.4 mi/h toward a 27 ton car that is moving in the same direction at 2.0 mi/h.

What is the speed of the pair after they couple together?

What fraction of the initial kinetic energy was lost in the collision?

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Physics: In a railroad switchyard a 50 ton freight car is sent at 74

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Physics: In a railroad switchyard a 50 ton freight car is sent at 74

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