Definition:Opposite Direction
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Definition
Let $\mathbf v$ and $\mathbf w$ be vectors in space.
We say that $\mathbf v$ is in the opposite direction to $\mathbf w$ if and only if:
- the lines of action of $\mathbf v$ and $\mathbf w$ are parallel
but at the same time:
- the lines of action of $\mathbf v$ and $\mathbf w$ are not the same.