Question

Equilibrium/statics problem. Help, please: http://i.imgur.com/X0BrZmK.png

Answer 1

Sorry for the bad taken picture, anyways.

Answer 2

We're dealing with forces on the pole and box. Some will be torque (about the center of mass) and some will be linear force. All must cancel out, so that the object has no acceleration!

First, we'll look at the distance from the pivot (center of gravity, which is practically the center of mass), to where the forces are applied.

Next, we should look at the forces:

And then break them up into the purely linear forces and purely rotational torques. Here's how to split them apart: break up the forces into two components, like you probably have before, but this time, break it into one component that is either towards or away from the center of mass. This is the linear force, since it is in the direction of the fulcrum and thus there is no torque. See? \(\rightarrow\) \(\tau =r\ F\ sin(0^\circ) = 0\ [Nm]\). And the torque is perpendicular to that, as the second component. This is purely a torque, see? \(\rightarrow\ \tau =r\ F\ sin(90^\circ )=r\ F\), the full torque.
I'll modify the previous force diagram to show the split up forces.