Other Force problem !!! 1. The problem statement, all variables and given/known data Two forces act on a 3.1 kg mass, which undergoes acceleration a = 0.88 i - 0.28 j m/s2. If one of the forces is F1 = - 1.5 i - 3.0 j N, what is the other force? 2. Relevant equations I don't know how to visualize this !!!! 3. The attempt at a solution I know two component add to Force but I cant visualize. I know vectors as : F2 = ( 0.88 i - 0.28 j) * 3.1 which is 4th quadrant and F1 will be 3rd quadrant but how i can visualize it !!