Scalar Quantities:
The scalar quantities are known as scalars. This quantity has magnitude only such as length, mass, time, distance, volume, density, temperature, speed, etc.
Vector Quantities:
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.