Physics > Basic Vectors > 1.0 Introduction

  Basic Vectors
    1.0 Introduction
    2.0 Representation of vector
    3.0 Basic definition related with vectors
    4.0 Types of vectors
    5.0 Angle between the vectors
    6.0 Addition of vectors
    7.0 Subtraction of vectors
    8.0 Cartesian co-ordinate system
    9.0 Resolving vector into its components
    10.0 Dot product of two vectors
    11.0 Cross product of two vectors

1.1 Scalar quantities

The type of physical quantities which has only magnitude and no direction is called as scalar quantities.

Example:

Mass $=1\ kg$ ($1$ is magnitude, $kg$ is unit)
Time $=5\ s$ ($5$ is magnitude, $s$ is unit)
Speed $=10\ m/s$ ($10$ is magnitude, $m/s$ is unit)
Temperature $=50^\circ C$ ($50$ is magnitude, $^\circ C$ is unit)
Distance $=5\ m$ ($5$ is magnitude, $m$ is unit)

All the above scalar quantities has no direction associated with it.

Note: Magnitude is always positive. So, scalar quantities are always positive.

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