1. The problem statement, all variables and given/known data In the figure below, a uniform beam of length 12.0 m is supported by a horizontal cable and a hinge at angle θ = 70°. The tension in the cable is 500 N. (a) What is the gravitational force on the beam, in unit-vector notation? (b) What is the force on the beam from the hinge, in unit-vector notation? http://www.webassign.net/hrw/12-73.gif 2. Relevant equations Torque = r x f 3. The attempt at a solution The system is in equilibrium and so I assumed that the two should be the opposites of each other. My real problem, however is I have no idea how to calculate the Torque or the gravitational force without knowing the weight on the beam.