A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an angle of 60° with it. The other end rests on a rough…

A uniform rod of mass $\displaystyle 20$ kg and length $\displaystyle 5$ m leans against a smooth vertical wall making an angle of $\displaystyle 60$° with it. The other end rests on a rough horizontal floor. The friction force that the floor exerts on the rod is (take $\displaystyle \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$ )