A railroad tank car rolls on a track at 2 . 6 0 m / s toward
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Question:
A railroad tank car rolls on a track at ms toward two identical coupled tank cars, which are rolling in the same direction as the first, but at a speed of ms The first reaches the second two and all couple together. The mass of each is kg
a. What is the speed in ms of the three coupled cars after the first couples with the other two? Round your answer to at least two decimal places.
b. Find the absolute value of the amount of kinetic energy in J converted to other forms during the collision.
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