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It collides and couples with three other coupled railroad

A railroad car of mass 2.46 10⁴ kg is moving with a speed of 4.12 m/s. It collides and couples with three other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an initial speed of 2.06 m/s.

(a) What is the speed of the four cars after the collision? (Round your answer to at least two decimal places.)

m/s

(b) How much mechanical energy is lost in the collision?

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Physics: It collides and couples with three other coupled railroad

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