Mechanical Engineering: Trusses, Bridges & Other Structures (30 of 34) Forces=? on Members 2

In this video I will find the compression or tension and the forces of the indicated members of a truss structure, part 1.

Next video in this series can be seen at:

[Ali-shib]

my statics test is tomorrow and I've gone through this entire playlist over the past week. thank you for preparing me

[seanchong]

The equilibrium shown FCE in positive direction and this is by assume in positive direction. What if we assume negative direction? The outcome of the calculation will become negative which is in compression. This may lead to wrong judgement of force direction on later stage. Should we define the direction before moving on to calculation?

[brianshikanga]

thanks so much for your videos. they made me to really understand this topic.

[mokarrommolla]

Dear sir, I have off topic question for you. Is the hydraulic cylinder two force member? Thanks

[SuperGamerYoBros]

First/ So convenient came out the same day as I learned this. Great video.

[kingsstudio]

sir when solving trusses by method of sections we sometimes use various Pythagorean triple, how do we know which of the triples we are expected to use

[InstaFall]

at 3:30 you draw the forces DF and DE. what about the other forces DC DB AB or AC, why and how did you choose only those two forces to draw? Fa and 3kN is external but DF and DE seem internal which forces matter ?

[mokarrommolla]

Dear sir, When we draw a free body diagram at support A, we can see that the support at A has vertical and horizontal forces because of the pin. we are finding the moment at D. isn't the horizontal force from support A causing moment at D? Thanks

[stevenlin]

how to decide which method should I use? section or sum of forces? sum of forces seems to be easier.