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A dump truck, with a mass of 2030 kg, moves at a constant speed 2.23 m/s along a horizontal track. The truck then passes under a loading container and, as it does so, rocks fall vertically into it for 3.21 s at the rate of 497 kg/s. What is the truck's speed after the loading is completed? Ignore rolling friction (as unrealistic as that may be).

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