Practice: A boat on a river is traveling from a pier to a point 500 m upstream (against the river’s current)**.** The current flows at 4 m/s**.** If the boat makes the trip in 250 s, what is the speed of the boat relative to the water?

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Intro to Motion in 2D: Position & Displacement | 13 mins | 0 completed | Learn |

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Practice: A boat on a river is traveling from a pier to a point 500 m upstream (against the river’s current)**.** The current flows at 4 m/s**.** If the boat makes the trip in 250 s, what is the speed of the boat relative to the water?

Example #1: City B lies directly east of city A. Without any wind, an airliner makes the 2775-km flight between them in 3.30h. If a steady 225-km/h wind blows from west to east and the airliner has the same speed relative to the air as before, how long will the trip from A to B take?

A) 7.1 hrs

B) 2.6 hrs

C) 9.0 hrs

D) 5.2 hrs

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