Question

I am confused with boat and river problem. When we say relative velocity of point particle A wrt particle B it is easy to visualize, but here we have point particle A as boat and river is not point particle. And velocity of boat A is actually governed by velocity of river unlike other relative velocity problems. So it means that some force is acting on boat. Also VBW means water is stagnant and only boat is moving, so boat should move perpendicular to river to reach opposite bank. Now assuming river is flowing towards right with velocity nu, and boat is sailing with velocity u, then VBW should point straight to other side that is perpendicular to river velocity.

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