A 12-N force is applied at the point x=3m, y=1m. Find the torque about the origin if the force points in (a) the x direction, (b) the y direction, and (c) the z direction.
3. The attempt at a solution
The answer for (a) is 12Nm which is correct. However, I am unsure why the distance r must be extended down the the x-axis. Can it not be extended upward instead of downward?
Also, I do know how to use the right hand rule but how should I apply it to this question?