1. The problem statement, all variables and given/known data A Rod of Mass "M" is attached to a two-way hinge on the floor. It is being pulled by a spring (extension spring, so force is pulling the rod to the right, causing it to move clockwise). The hinge is frictionless. the rod has a mass of 5kg evenly distributed the pulling tension of the spring is 25N The angle between the rod and floor is 25 degrees D2 is 0.3 meters d1 is .15 meters How do I calculate the resulting vertical force of the rod against the ceiling? The system is in equilibrium. I am a bit rusty with angular torque. Any help would be greatly appreciated. 2. Relevant Equations: F=MA Torque=NM Hoooke's Law (I have already applied this..no need to incorporate/explain it further). CG=(W1d1+W2d2+W3d3...)/W 3. Work Towards Problem: I realize that since the system is in static equilibrium, the opposing forces will cancel each other out,, those forces being the tension of the spring (already solved) and the force of the rod against the ceiling. I think the answer lies in angular torque, something I am a bit rusty at.