There is no way to declare that they are definitely zero force members. However, you can't rule out members connecting to a support being a zero force member, but unlikely.
Glad it was useful for you. I can understand why it doesn't work for others, on campus my students have already analysed these trusses using method of joints in tutorial sessions. I also reinforce in class with many more tutorial problems, you have to get your hands dirty with mechanics.
Identifying the zero force members speed up the method of joints. My on-campus students do this problem in method of joints tutorials before we introduce this, so they already know that the members are zero force members.
Thank you so much!! I'm preparing to take the FE exam and you made zero force members very clear.
Glad it helped!
Really useful. Clear explanation and good and easy example. Thank you
thank you for taking the time to leave feedback
At 2:58, can you explain further? Are joints at any supports not zfm's because the support is a reaction?
There is no way to declare that they are definitely zero force members. However, you can't rule out members connecting to a support being a zero force member, but unlikely.
Thank you very much for this video. very good and clear explanation. dont know how people dislike this video....
Glad it was useful for you.
I can understand why it doesn't work for others, on campus my students have already analysed these trusses using method of joints in tutorial sessions. I also reinforce in class with many more tutorial problems, you have to get your hands dirty with mechanics.
I couldnt agree more...
Great video. Thank you.
DETERMINE ALL THE MEMBER FORCES IN THE LOADED TRUSS BY METHODS OF JOINTS . POSSIBLE TO SOLVE THE PROBLEM
Identifying the zero force members speed up the method of joints. My on-campus students do this problem in method of joints tutorials before we introduce this, so they already know that the members are zero force members.
Thnks
Thanks too much
No problem
You are incorrect, in the first problem, CE is not a ZFM, because you have a 5KN external load
The external load is applied at E. If you were to draw a free body diagram of joint C then F_CE would be the only force with a vertical component.