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===About Resultant Forces===
: A '''resultant force''' can be calculated by taking [[force]]s that act in opposite directions and subtracting one from the other.
{| class="wikitable"
|-
|[[File:UnbalancedForces1.png|center|150px]]
|[[File:UnbalancedForces2.png|center|200px]]
|[[File:UnbalancedForces3.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |There is 4[[N]] up and the 7[[N]] down.
: 7[[N]] - 4[[N]] = 3[[N]]. The resultant force is 3[[N]] down.
| style="height:20px; width:200px; text-align:center;" |There is 4[[N]] left and the 3[[N]] right.
: 4[[N]] - 3[[N]] = 1[[N]]. The resultant force is 1[[N]] left.
| style="height:20px; width:200px; text-align:center;" |There is 6[[N]] up and the 6[[N]] down.
: 6[[N]] - 6[[N]] = 0[[N]]. The resultant force up and down is 0[[N]].
There is 6[[N]] left and the 4[[N]] right.
: 6[[N]] - 4[[N]] = 2[[N]]. The resultant force is 2[[N]] to the left.
|}