Final answer:
In static equilibrium, plate ACDE is horizontal as the forces acting on it are balanced.
Step-by-step explanation:
In static equilibrium, plate ACDE will be horizontal.
When an object is in static equilibrium, the net force acting on it is zero and the net torque acting on it is also zero. This means that the object is not accelerating and is not rotating.
In this case, if plate ACDE is in equilibrium, it means that the forces acting on it are balanced, resulting in no net force. Therefore, the plate will be horizontal.