Determine the force in each member of the truss. Chapter 6: Hibbeler Statics | Engineers Academy

[@Skibidi-r8c]

Why did the P1 disappeared in joint F for summation of Fy

[@lydiacurreri9898]

best explanation ever

[@andysgrowth-le6hn]

For point E, I don't understand the explanation. All I heard was "I selected this direction of these three forces like this," what does this mean? How can you just select the direction of forces?

[@EngineersAcademy2020]

When ur not sure u can always assume the directions.

[@rpjtv8041]

what about the supports at A and G??

[@EngineersAcademy2020]

Consider the whole truss and apply equilibrium conditions.

[@yasmidtsofiamendozatorres3991]

what would happen if we have a roller at point C

[@brandontapia2055]

Would it matter if we say the force fcd is acting to the left instead of the right at joint D?

[@TFIta369]

I believe you can say it points to the left or to the right, in the beginning. When you isolate Fcd in the equations, you would get a positive sign if you assumed the correct orientation or a negative sign if you assumed the contrary.

[@pearlthecryptid3836]

Thank you so much! Do you think you could explain 6-42 please? I'm looking at some solutions and some methods some people use for that one but all my equations end up in Tension, when I do it, instead of Compression and I'm not sure how and why that is. If you could also explain 7-8 and 7-13 from this book when you have time I'd greatly appreciate it! Thank you for this channel!

[@EngineersAcademy2020]

Welcome!

[@이주호-w3o]

감사합니다~!

[@bigot5408]

I thought it will be a compression force when the force is negative. I don't understand the explanation of Tension and compression

[@sacrificemylifeforjuraku2279]

if its goes away from the joint you have chosen to solve its tension if its coming towards to the joint then its compression