- Equal Vectors Two vectors of equal magnitude, in same direction are called equal vectors.
B
A
- Negative Vectors Two vectors of equal magnitude but in opposite directions are called negative vectors.
A B
- Zero Vector or Null Vector A vector whose magnitude is zero is known as a zero or null vector. Its direction is not defined. It is denoted by 0.
Velocity of a stationary object, acceleration of an object moving with uniform velocity and resultant of two equal and opposite vectors are the examples of null vector.
- Unit Vector A vector having unit magnitude is called a unit vector.
A unit vector in the direction of vector A is given by  = A / A
A unit vector is unit less and dimensionless vector and represents direction only.
- Orthogonal Unit Vectors The unit vectors along the direction of orthogonal axis, i.e., X –axis, Y axis and Z – axis are called orthogonal unit vectors. They are represented by
Y
j
X
k i
Z
- Co-initial Vectors Vectors having a common initial point, are called co-initial vectors.
B
o A
- Collinear Vectors, Vectors having equal or unequal magnitudes but acting along the same or Ab parallel lines are called collinear vectors.
A B
- Coplanar Vectors, Vectors acting in the same plane are called coplanar vectors.
- Localized Vector, A vector whose initial point is fixed, is called a localized vector.
- Non-localized or Free Vector A vector whose initial point is not fixed is called a non-localized or a free vector.
- Position Vector ,A vector representing the straight line distance and the direction of any point or object with respect to the origin, is called position vector.
