Statics free body diagram (frames and machines)

[lc99]

Homework Statement

Homework Equations

Trying to find the reaction forces at E. But, I am kinda confused about drawing the free body diagram for each member. I know that member AD and CB are two force members. What is wrong with my free body diagram then?

The Attempt at a Solution

i apologize if everything is not straight. Just assume that i tried to draw it straight!

 

[haruspex]

What is wrong with my free body diagram then?

I see two errors in your AB diagram.
You have the load from above wrong, and you show no reaction forces from the wall.

 

[lc99]

I see two errors in your AB diagram.
You have the load from above wrong, and you show no reaction forces from the wall.

Ohh. okay about AB
The distributed load is the area of the two triangles and it is centered at the centroid ?

I also posted another problem very similar to this. I followed the same thing and add the wall(floor) reactions but it ended up being wrong

 

[haruspex]

The distributed load is the area of the two triangles and it is centered at the centroid ?

Ok, maybe I misunderstand the diagram. If it is to be interpreted as a load that is a maximum of 4kN/m in the middle, reducing linearly each side, then I agree with your number. Since it only specified 4kN/m I took the load to be constant.

I followed the same thing and add the wall(floor) reactions but it ended up being wrong

If you post the link I will take a look, but in this thread I believe you need to includ those reactions.

 

[lc99]

Ok, maybe I misunderstand the diagram. If it is to be interpreted as a load that is a maximum of 4kN/m in the middle, reducing linearly each side, then I agree with your number. Since it only specified 4kN/m I took the load to be constant.

If you post the link I will take a look, but in this thread I believe you need to includ those reactions.

here is the link. thank you! :)
https://www.physicsforums.com/threads/statics-problem-free-body-diagram.944966/#post-5980018

 

[haruspex]

here is the link. thank you! :)
https://www.physicsforums.com/threads/statics-problem-free-body-diagram.944966/#post-5980018

Ok, I have posted an answer there, and you are making the same mistake in this thread.