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→Positive and Negative Direction
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|[[File:ForceNumberLineVertical.png|center|200px]]
| style="height:20px; width:300px; text-align:center;" |If the 'up' direction is chosen to be [[Positive (Number)|positive]] then any [[vector]] pointing 'up' has a [[Positive (Number)|positive]] [[magnitude]] value and any [[vector]] pointing 'down' has a [[Negative (Number)|negative]] [[magnitude]]value.
In this [[diagram]] the green [[vector]] has a [[magnitude]] value of +2 while the red [[vector]] has a [[magnitude]] value of -4.
If the number lines represent the number of [[Newton]]s [[force]] then the [[Resultant Force]] is the two [[magnitude]]s values added together.
F<sub>Resultant</sub> = (+2N) + (-4N)
|[[File:ForceNumberLineHorizontal.png|center|400px]]
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| style="height:20px; width:400px; text-align:center;" |If the 'right' direction is chosen to be [[Positive (Number)|positive]] then any [[vector]] pointing 'right' has a [[Positive (Number)|positive]] [[magnitude]] value and any [[vector]] pointing 'left' has a [[Negative (Number)|negative]] [[magnitude]]value.
In this [[diagram]] the blue [[vector]] has a [[magnitude]] value of +3 while the yellow [[vector]] has a [[magnitude]] value of -2.
If the number lines represent the number of [[Newton]]s [[force]] then the [[Resultant Force]] is the two [[magnitude]]s values added together.
F<sub>Resultant</sub> = (+3N) + (-2N)