I have the following system, which is in equilibrium:
It's a bar that can pivot around A, and is held in place by a string at B
I'm supposed to find the force applied to the bar at the pivot. I assumed that said force would have a component on the x axis and a component on the y axis (where the x axis is parallel to the ground)
The solution in my book, however, has the following diagram:
The way it's solved in my book, along with the diagram, imply that the force at the pivot ONLY has a vertical (on the y axis) component.
Why is this true? I would have assumed that, in order for the system to be in equilibrium, this force would have a component on the x axis with the same value and opposite direction than that of the string tension projected on the x axis.
Is my reasoning incorrect? If so, why?