The 12-Mg truck drives onto the 350-Mg barge from the dock at 20 km/h and brakes to a st...

The 12-Mg truck drives onto the 350-Mg barge from the dock at 20 km/h and brakes to a stop on the deck. The barge is free to move in the water, which offers negligible resistance to motion at low speeds. Calculate the speed of the barge after the truck has come to rest on it.