Colinear Vectors

2 vectors are going in the same direction but have different scalars.

Proving Collinearity

Algebraic Proof

$\vec{u}=k\vec{v}$ if a value of $k$ exists, then $\vec{u}$ and $\vec{v}$ are colinear

Dot Product Proof

$\vec{v}\cdot \vec{u}=|\vec{v}|\ast |\vec{u}|$ As this would mean the angle is 0 or 180.