Force balance equations with moving base

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SUMMARY

The discussion revolves around solving force balance equations for a static base A and a movable base B in a system with given dimensions and loads. The parameters include a distance of 9m for AD and DC, a load P of 78kN, a load S of 25kN, and an angle alpha of 35 degrees. The main confusion lies in determining the forces acting on base B, specifically whether to include horizontal force components (Bx) or only vertical components (By). The consensus is that only By exists at base B, and Bx can be calculated using trigonometric methods based on the applied loads.

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Homework Statement


IMG_20160929_162844.jpg

Given:
AD=DC = 9m
P=78kN
S=25Kn
Angle alpha = 35 deg
A is static but B is movable

I need to solve forces on the bases A and B
I do not understand where do I mark the forces if there is a base that can move.

Homework Equations

The Attempt at a Solution


My attempt:
IMG_20160929_162955.jpg

I am not sure whether there should be Bx or Ax.[/B]
 
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Is there only By on the base B? If so, is the B vector still calculateable with trigonometry, or the only force there will be By, without any Bx?
 

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