Vector

Vector quantities are often represented by scaled vector diagrams. Vector diagrams depict a vector by use of an arrow drawn to scale in a specific direction. Vector diagrams were introduced and used in earlier units to depict the forces acting upon an object. Such diagrams are commonly called as free-body diagrams. An example of a scaled vector diagram is shown in the diagram at the right. The vector diagram depicts a displacement vector. Observe that there are several characteristics of this diagram that make it an appropriately drawn vector diagram.

**Scale : as we do keep scale while drawing a graph.
  • a scale is clearly listed
  • Head of the vector always points towards the Direction.
  • Magnitude of the vector is shown by the length of the vector. In this case, the diagram shows the magnitude is 20 m and the direction is (30 degrees West of North).
**Length : Sometimes it is not possible to show higher magnitudes like 100 km in that case we use scale.















Vector = scalar(magnitude) + direction





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