Unit Vectors

Key Questions

  • The direction of a vector is the direction along which it acts.
    It has a certain magnitude.

    For example, we say 10 N force in the east.
    Here, 10 N is the magnitude and towards the east is the direction.

    The direction is specified using a unit vector.
    Let n be a unit vector along a certain direction and #A# be some scalar, then a vector with magnitude that of #A# and direction that of n is defined as,

    A = #A# n

  • A unit vector is a vector that has a magnitude(length) of just 1 unit.

    Please see the video example below ...

    Unit Vector Video