Determine the horizontal and vertical components of reaction at the pin A and the reaction of the rocker B on the beam.
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Let us first draw a free body diagram showing all the forces affecting the beam. Remember that since the beam is in equilibrium, all forces added must equal 0.
We can first solve for N_B by writing a moment equation at point A.
Now, we can write an equation along the x-axis like so:
Next, we can write another equation along the y-axis: