Understanding Vectors for 3D Equilibrium of Rigid Bodies Problems!
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- čas přidán 12. 02. 2022
- Question *5-88: Determine the X and Z components of reaction at the journal bearing A and the tension in cords BC and BD necessary for equilibrium of the rod.
If you have any recommendations for future problems, suggestion for tutorials in the future, or questions related to the problem, free to leave a comment!
This Video is a bit longer than usual due to the recall to vectors that is needed to solve this problem, feel free to ask questions about previous concepts related to this problem if needed. Thanks for Watching !
great video!! explained it so much better than my prof thank you!!!
Glad it helped! Good luck with your studies pal
thank you brother
No problem, glad I could help
Nice Job Mate!
Appreciate it mate, cheers!
How can we tell the sign of the moments i.e. for the moment due to F1 when regarding the various axes? I'm trying to use the right hand rule and it just doesn't seem to work out. Could you provide an explanation on how to determine the direction of these moments? Thank you.
Hey!
To start, the right hand rule is applicable to our sign conventions here. Our thumb points in the positive direction of our axis, and the moment reactions were both drawn in the positive convention (following our grip around the axis).
If we look at only F1, we would have moment reactions about the y and x axis. The support allows no moment reaction to develop on the y axis, and the z axis is parallel to our force, so there will be no moment reaction there either.
Now, solving for the moment at x (Max), F1 would create a clockwise moment about that axis. This means our reaction moment will be counterclockwise. This also means our assumption to drawing it this way was correct!
Hope this helps!
@@simple_civil Sorry but I'm still not one hundred percent -- if we point our thumb in the direction of the positive y-axis, are our fingers, before curled, the direction of the force (for F1 this would mean that the fingers are pointing down still with the thumb pointing along the positive y-axis and for FBC and FBD are pointing up) and the curling defines the direction? Because if I do that, the curling due to FBC / FBD about the positive y-axis would still be counterclockwise.
I appreciate you taking the time to help.