Question

Addition and subtraction of vectors: Velocities are vectors, we can add subtract velocities: [5A] a). An airplane flies with a velocity 400km/h towards North, it encounters a wind blowing from the West with velocity of 50 km/h, what is the resulting velocity of the airplane

Answer 1

Answer:

  403 km/h 7° east of north

Step-by-step explanation:

You want the resultant velocity of a plane flying 400 km/h north in a wind blowing 50 km/h to the east.

Vector sum

The attached calculator display shows the sum of the vectors ...

  400∠0° + 50∠90° ≈ 403∠7°

Angles here are heading angles, measured clockwise from north.

The velocity of the airplane is 403 km/h about 7° east of north.

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Additional comment

When angles are specified this way, the calculator provides rectangular coordinates as (north, east). The internal representation of the vectors is as complex numbers with components (north + i·east). This representation is convenient for adding and subtracting vectors, and for finding bearing angles and the angles between vectors.

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