Question

How will you represent a vector quantity?

Answer 1

Any quantity having magnitde as well as direction is called a vector .
Vector quantity is represented by putting the arrow on the top of the quantity .
for example velocity is a vector quantity but speed is a scalar quantity.
 

Answer 2

Vectors quantities are physical quantities that have both magnitude and direction.  To uniquely specify these quantities we need a reference point and reference lines, i.e. we need a coordinate system.  The most commonly used coordinate systems are rectangular, Cartesian coordinate systems.  Other widely used coordinate systems are cylindrical and spherical coordinate systems.