Draw the free body diagram of the whole structure as seen in the figure….
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Question:
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Technifi Expert’s Answer:

Draw the free body diagram of the whole structure as seen in the figure.

Equate the moments about the point G to zero.
Therefore, the reaction force at A in ydirection is.
Equate the moments about the point A to zero.
Therefore, the reaction force at G in ydirection is.
Since there are no horizontal forces involved in the structure except the one at G, the reaction force at G in horizontal direction will be zero.
Therefore, the reaction force at G in xdirection is.
Draw the free body diagram of the member CF as seen in the figure.
Equate the moments about the point B to zero.
Therefore, the reaction force at E in ydirection is.
Equate the forces in the ydirection to zero.
Substitute.
Therefore, the magnitude of force at B in xdirection is.

Draw the free body diagram of the member GD as seen in the figure.

Equate the forces in the ydirection to zero.
Substitute.
Therefore, the magnitude of the pin reaction force at D in ydirection is.
Equate the moments about the point E to zero.

Substitute.
As no other horizontal forces are involved, the horizontal reaction forces at D and E are equal in magnitude and opposite in direction.
Therefore, the reaction force at E and D is.

Draw the free body diagram of the member AD as seen in the figure.

Equate the moments about the point D to zero.
Substitute.
Therefore, the magnitude of reaction force at B in xdirection is.
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