it appears you don't need elastic response, so you could use the rigid body analysis called "Motion Simulation" in SolidWorks. That way you can set up an actuator and obtain the reaction force throughout tilt angles. If inertia is a concern, you can run the simulation with assigned weights to the parts, and accelerate the panel through tilt angles. Good luck!
If you are wanting to see when tilting "begins" then you are a little more interested in frictional effects (this can be input in a Motion Analysis as Anthony has suggested. If you do not consider thee effects of friction then the solar panel will move no matter how small a force is applied (above that required to keep it stationary). Again, this is not a case of structural stress but instead one of statics and dynamics.
typical value for friction:
metal-metal = 0.2
If your professor feels the need to consult someone who lives closer to reality, have him contact me.
You may need such dynamic response if you are trying to keep the solar panels focused on a firefly. However, at the slow speeds a solar panel moves, inertial effects are contained well within whatever safety factor one might build into a static structure. You need enough force to hold the static position and only a skosh more.
You should be far more concerned about wind load.