Scalar facts for kids
Suppose we are measuring a rod. We could give the measured length as 2 metres or 3 cm etc. depending on the length of the rod under observation. Here only the figure 2 or 3 along with the unit of measure is enough to transmit information about the rod.
Other examples of scalars are:
i.e. mass is measured by scalars, distances are measured by scalars.
The other family of measurement falls under the category of vectors.
Scalar Facts for Kids. Kiddle Encyclopedia.