A physical quantity is something that can be measured. Scalar quantities only have size (or magnitude). Vector quantities have size and direction. Speed is a scalar quantity - direction is not ...

Scalar quantities have only magnitude (size). For example, 11 m and 15 m s-1 are both scalar quantities.

Students learn to distinguish between scalar and vector quantities. Introduction to Vectors: Students learn to distinguish between scalar and vector quantities and how to state the magnitude and ...