When an object is not moving, all the forces acting on it must sum to 0 . The object is said to be in equilibrium. Two cables of different lengths hold a stoplight over an intersection. The force vectors being applied along the two cables are (20,18) and (-20,12) . The magnitude of each vector is measured in pounds. A third force vector in this situation is the force due to gravity, and is straight downward. How much does the stoplight weigh?