Equal vectors, null vector, unit vectors, position vector, like and unlike vectors,collinear and parallel vectors

Collinear and coplanar vectors

What is a null vector ?

The unit vector parallel to vecA is

Express the vector in unit - vector notation.

Explain (i) Unit vector (ii) Equal vectors (iii) Negative vectors, (iv) Coinitial v ectors (v) Collinear vectors and (vi) Copanar vectors.

Position vector and a vector in terms of position vectors of its end points

Distinguish between position vector and displacement vector.

Expressing A Vector In Unit Vector Notation

Two vectors overline(a) and overline(b) are collinear or parellel of coincident vectors, if