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Relative velocity

A motorboat going downstream overcome a raft at a point A; t = 60 min later it turn back and after some time passed the raft at a distance 6.0 km from the point A. Find the flow velocity assuming the duty of the engine to be constant.

Solution Preview

Let the speed of the boat in still water be v (constant due to the engine) and flow speed of water is u.
Speed of the boat down the river relative to ground is v + u and the same up the river is ...

Solution Summary

A conceptual question good to learn relative velocity.