A ferry moves at 5 m/s in still water. It must cross a river 200 m wide, flowing at 3 m/s, and land at the point directly opposite. In which direction should it point, and how long does the crossing take?

PhysicsMediumHigh School (11–12)Mechanics › Relative Motion

A ferry moves at $5\ \text{m/s}$ in still water. It must cross a river $200\ \text{m}$ wide, flowing at $3\ \text{m/s}$ , and land at the point directly opposite. In which direction should it point, and how long does the crossing take?

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