1. The problem statement, all variables and given/known data The moment of the couple is 600k (N-m). What is the angle A? F = 100N located at (5,0)m and pointed in the positive x and positive y direction -F = 100N located at (0,4)m and pointed in the negative x and negative y direction 2. Relevant equations M = rxF M = D 3. The attempt at a solution M = 600k |F| = 100N r = <5,-4> rxF = a 3x3 determinant with <i , j , k> <5, -4, 0> <Fx , Fy, 0> = 5Fy + 4Fx +0 = 600k but i've only got 1 equation and 2 unknowns now!