The scalar quantities are known as scalars. This quantity has magnitude only such as length, mass, time, distance, volume, density, temperature, speed, etc.
The vector quantities known as vectors are those quantities that have both magnitude and direction such as force, displacement, velocity, acceleration, momentum, etc.
Features of Vector Quantities:
1. Representation of a Vector: A vector is represented by a directed line. It may be noted that the length OA represents the magnitude of the vector OA’. The direction of the vector is OA’ is from O to A. It is also known as vector P.
2. Unit Vector: A vector whose magnitude is unity. It is known as a unit vector.
3. Equal Vectors: The vectors which are parallel to each other and have the same direction and equal magnitude are known as equal vectors.
4. Like Vectors: The vectors which are parallel to each other and have the same sense but unequal magnitude are known as like vectors.