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Add the following forces: 20 Newtons south, 30 newtons north, 40 newtons east, and 50 newtons west

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User Maziar
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The north and south forces have no effect on the east and west forces.
We can handle the two groups separately.

(20N south) + (30N north)

= (20N south) + (20N north + 10N north)

= 10N north .


(40N east) + (50N west)

= (40N east) + (40N west + 10N west)

= 10N west .
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User Kyri Sarantakos
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