Displacement vectors
Displacement is a vector \(\vec{r} = r\angle \theta \), has magnitude \(r\) (\(r=|\vec{r}|\))
and direction \( \theta \).
Graphical vector addition: \(\vec{C} = \vec{A} + \vec{B}\) i.e.
first \(\vec{A}\) and then \(\vec{B}\)
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tail--to--head rule |
parallelogram rule |
Of course, \( \vec{A} + \vec{B} = \vec{B} + \vec{A} \), so it could be first \(\vec{B}\) and then \(\vec{A}\)
Magnitudes do not just add: \( C \neq A + B \)
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