ABSTRACT
A scalar is a quantity which has magnitude only, that is, it has size only. Examples are temperature, energy and mass. A vector is a quantity that has magnitude, but in addition it has a direction in space. Examples are force, velocity and acceleration. A vector may be represented by a line whose direction is drawn parallel to the actual vector, which has a length proportional to the size of the vector. Vectors such as velocity, force are not tied vectors. Such a free vector can be represented by any one of a number of parallel lines. This chapter discusses the addition, subtraction, and multiplication of vectors. It also describes the scalar product of two vectors with some examples in engineering field.
