A railroad freight car rolls on a track at 2.65 m/s toward twoidentical coupled freight cars, which are rolling in the samedirection as the first, but at a speed of 1.20 m/s. The firstreaches the second two and all couple together. The mass of each is2.30 ✕ 104 kg.
(a) What is the speed (in m/s) of the three coupled cars afterthe first couples with the other two? (Round your answer to atleast two decimal places.)
(b)Find the (absolute value of the) amount of kinetic energy (inJ) converted to other forms during the collision.
