Right the question is;
a tug boat is used to pull a barge along a river at constant velocity.
the tug boat pulls on the barge with a force of 4.5kN.
the tug boat engine drives the tug boat forward with a force of 7 kN.
1. what is the drag force on the tug boat due to the water?
2. what is the drag force on the barge due to the water?
i was thinking, is 1. just 7kN because the forces are equal and opposite, and velocity is constant
and for 2. is it just 7- 4.5?
any help would be just gorgeous!
thank you all!