Hi there. This problem is very basic but I really cannot figure out how to solve it. I'm missing something but I have no clue what it is. 1. The problem statement, all variables and given/known data Three forces act on a moving object. One force has a magnitude of 80.0 N and is directed due north. Another has a magnitude of 60.0 N and is directed due west. What must be the magnitude and direction of the third force, such that the object continues to move with a constant velocity? 2. Relevant equations Force X Y F1 F1Cos90 F1Sin90 F2 -F2Cos90 F2Sin90 W 0 -W=-mg 3. The attempt at a solution F1Cos90-F2Cos90+0=0 (Then divide by Cos90) F1=F2=>F FSin90+FSin90=mg 2FSin90=mg F=mg/2(Sin90) F=mg/2(1) F=mg/2 I would be very thankful if someone could please tell me what I'm doing wrong and what I should be doing so that I may learn from this question.