What Is Drift in River Boat Problems?

Say if there is a boat which has velocity 5m/s with respect to the river. It aims to reach point A, however, because of the river speed it reaches another point B. Then this Distance AB is called 'drift.So it's a distance.

What is a drift in a river?

The gravel deposits accumulated by a river in its torrential stages.

Where is the drift on a river boat problem?

The boat cannot cross the river to an exactly opposite point. In this case, the drift is minimum if →vb=→vb/w+→vw v → b = v → b / w + v → w is perpendicular to →vb/w v → b / w .