what is scalar and vector quantities consider the following wind weather report. The wind speed can be reported by saying it is 25 miles per hour. The reported speed is not a vector quantity it is a scalar. However just reporting the wind speed does not give all the information about the wind. Someone wanting to go sailing will also want to know the wind direction. In this case direction matters. A more complete wind velocity report might say that the wind is blowing 25 miles per hour towards the northeast. This wind velocity includes both the magnitude (25 miles per hour) and the direction (towards the northeast) so it is a vector quantity . Some other quantities are scalars because the concepts of direction makes no sense. For example the phrase 30 kilograms to the south does not make sense. Mass does not have a direction therefore mass is a scalar quantity.