### What is the speed of the three coupled cars after collision

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##### Reference no: EM13543319

A railroad car of mass 3.5*10^4 kg moving at 2.50 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 1.20 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? (joules)

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