# Pilot disobeys physics and faces consequences

Classical Mechanics Level 3

An airplane wants to fly from $$A$$ to city $$B$$ which is $$1000 \text{ km}$$ due north of city $$A$$. The speed of the plane in still air is $$500\text{ km/hr}$$. The pilot neglects the effect of the wind and directs his plane due north and two hours later find himself $$300\text{ km}$$ due north-east of city $$B$$. The magnitude of wind velocity is (in $$\text{ km/hr}$$) .

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