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## Homework Statement

Viewing a solution on the internet to this question, the free body diagram is drawn as:

The forces here are then used to solve for ##F_D## and this is given as the answer to "the force which the bar exerts on the link at D". I'm just confused as to why there is no vertical component of the force at D, ie ##F_Dy##. Then the total force at D is $$F_D = F_{Dx}\hat {\mathbf i} + F_{Dy}\hat {\mathbf j}$$

Cheers