Figure 1 A broom is being used to sweep a rough horizontal floor. The handle of the broom makes a constant angle of 40° with the horizontal, as shown in Figure 1. The broom head is modelled as a particle of mass 0.5 kg and the handle of the broom is modelled as a light rod. The coefficient of friction between the broom head and the floor is 1/4 The broom head is pushed along the floor in a straight line at constant speed. Find the magnitude of the force that is being applied along the handle of the broom to the broom head.

Why is Psin40 down?
and why when resolving Psin40 +0.5g =R
why is weight on the same side of equation with psin40
I'm assuming that p is the force but correct me if I'm wrong

(Edexcel M1 June 2019)​