1 A tug boat is used to pull a barge along a river at constant velocity, as shown below. The tug boat pulls on the barge with a force of 4.5 kN. The tug-boat engine drives the tug boat forward with a force of 7.0 kN.
Calculate:
The drag force on the boat due to the water,
The drag force on the barge due to the water.
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