Asked by melissa

Three co-linear forces f1=45 N west,f2=63 N east and an unknown force f3 are applied to an object.the resultant of the three forces is 12 N west determine the magnitude and direction of the force f3 using algebraic calculations. Thank you indvance.
Answered by Steve
f1 = <-31.82,31.82>
f2 = <44.55,44.55>
r = <-8.49,8.49>

f3 = <x,y> where

-31.82+44.55+x = -8.49
31.82+44.44+y = 8.49

Now just find x and y.
Answered by kem
How did you find f1,f2 and f3?
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