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A person walks in the following pattern: 2.9 km north, then 1.9 km west, and finally 8.0 km south. How far and in what direction would a bird fly in a straight line from the same starting point to the same final point?

  • physics -

    Add the displacements.

    d=2.9km N + 1.9km W -8km N

    then you have a N, and a W component.

    direction=arc tan Ecomponent/Ncomponent (as measured clockwise from N).

    magnitude: sqrt(N^2 + E^2)

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