An empty 15 000-kg coal car is coasting on a level track at 5.00 m/s. Suddenly 5000
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An empty 15 000-kg coal car is coasting on a level track at 5.00 m/s. Suddenly 5000 kg of coal is dumped into it from directly above it. The coal initially has zero horizontal velocity with respect to the ground. Find the final speed of the car.
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