A light rigid rod $XY$ has an object of weight $W$ attached at one end. The rod is balanced, with support from a roller at $Z$ and a vertical wall at $X$. The roller provides a force $R$ on the rod, as shown. The diagram indicates the directions, but not the sizes, of the forces $R$ and $W$. What is the direction of the force acting on the rod at $X$?
Physics 9702 · AS & A Level · Equilibrium of forces