Kinetic energy

In 1896 in Waco, Texas, Willian crush parked two locomotives  at opposite ends of a 6.4-km-long track, fired them up, tied their throttles open, and then allowed them to crash head-on at full speed (Fig. 7 -1) in front of 30,000 spectators. Hundreds of people were hurt by flying debris; several were killed. Assuming each locomotive weighed 1.2 × 106 N and its acceleration was a constant 0.26 m/s2., what was the total kinetic energy of the two locomotives just before the collision?

 

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