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phys: remove parallelogram rule

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eggy 2020-09-22 10:52:23 -04:00
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@ -207,12 +207,6 @@ $$
(a_{x}, a_{y}) - (b_{x}, b_{y}) = (a_{x} - b_{x}, a_{y} - b_{y})
$$
### Parallelogram rule
The parallelogram rule states that the sum of two vectors that form two sides of a parallelogram is the diagonal of that parallelogram. The **sine** and **cosine laws** can be used to solve for the resultant vector.
<img src="/resources/images/vector-parallelogram.png" width=700>(Source: Kognity)</img>
### Multiplying vectors and scalars
The product of a vector multiplied by a scalar is a vector with a magnitude of the vector multiplied by the scalar with the same direction as the original vector.