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In: Physics

A railroad car of mass 35000 kg moving at 4.00 m/s collides and couples with two...

A railroad car of mass 35000 kg moving at 4.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 2.00 m/s.

a) What is the speed of the three coupled cars after the collision?

b) How much kinetic energy is lost in the collision?

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