Definition:Scalar Projection/Definition 3

Definition
Let $\mathbf u$ and $\mathbf v$ be vector quantities.

The scalar projection of $\mathbf u$ onto $\mathbf v$ is defined and denoted:


 * $u_{\parallel \mathbf v} = \mathbf u \cdot \mathbf {\hat v}$

where:
 * $\cdot$ denotes the dot product
 * $\mathbf {\hat v}$ denotes the unit vector in the direction of $\mathbf v$.


 * Scalar-projection.png

Also see

 * Equivalence of Definitions of Scalar Projection