1. The problem statement, all variables and given/known data In fig. 13-32, a 50.0 kg uniform square sign, 2.00 m on a side, is hung from a 3.00 m horizantal rod of negligible mass. A cable is attached to the end of the rod and to a point on the wall 4.00 m above the point where the rod is hinged to the wall. (a) What is the tension in the cable? What are the magnitudes and directions of the (b) horizantal and (c) vertical components of the force on the rod from the wall? 2. Relevant equations Net force = zero Net torque = zero 3. The attempt at a solution I don't understand how there is a vertical component exerted by the wall onto the rod.