Statics: Lesson 24 - 3D Moment About a Point and rXF Example

Top 15 Items Every Engineering Student Should Have!

This video is NOT sponsored. Some product links are affiliate links which mean if you buy something we'll receive a small commission.

Please consider supporting the channel by subscribing, commenting, and liking each video. This moves these videos up the search list and helps me greatly. Thank you for watching.

This video is copyrighted by the Jeff Hanson for the private use of our audience. Any other use of this video or any pictures, descriptions, or accounts of the video without written consent from Jeff Hanson is strictly prohibited.

[mellorine]

"Are you scared? Don't be scared. I got you man, I got you." T_T T_T thank you so much professor this really made my day T_T <3

[JoseDuarte-mbhy]

Thanks so much DR Hanson, I was having trouble understanding this topic. You’re videos really help a lot, they are funny and you are great at explaining.

[jethior]

the way you teach, your explanation, your joke, your ways of explaining problems, everythingis awesome my dear. you are really true teacher. if it were not for, i donna what to do with mechanics.

[leonoreellenrose]

you just made the whole topic easier to understand sir... Godbless!

[georgesadler]

DR. Hanson, thank you for another incredible calculation of 3D Moment About a Point and rxF Example.

[ExtraIceGum]

I have a test with one of these problems in 52 minutes. Let my tomb stone read “I tried”

[kaili]

I am so happy that I can figure this out now. Thank you so much, Professor Hanson.

[vamp.]

Prof. Hanson, you are better than Prof. Michael Seica @the university of Toronto (the #1 rated university in Canada)... congrats!!!

[godwincornelius]

Thanks Mr Jeff... All I needed was the definition for "r"

[rnprogamer]

When he said i got you homie i knew i was going to understand

[yashovardhankothari]

I love you
You are a god
You save me from crappy university lectures

[papahemmy]

Thx, your video helped me test my custom moment program for my ti-84

[medicisounds]

Hi, in the beginning you said i can take the Point A and attach it to anywhere to the LOA of force. When i do these exact steps using A to E i get completely different Moments. Would it not come out to pretty similar results? I ask that because when you attached it to the point D at first you then had to move the origin? Is that not an extra step that should be eliminated if you just had attached r vector to point E?

[naiemataliep]

i pray that you win the lotto, thank you

[princemensah]

Thank you so much Dr. Hanson for making equilibrium of forces an easy course for me

[nitinpashine]

Doubt about Co-ordinate for pt D. I think that might be (-10, 20, 4)

[victorcasillas]

i figured it out. the force vector has a force that has to be taken into account when breaking it up and r vector doesn't.

[MichaelOwens]

Do you need to annotate CW or CCW direction for the moment? If so, can you explain how you determine its direction?

[victorcasillas]

Why did you use lambda hat for the force vector and not r vector, and how do i know how to tell?

[mulamulelimanyaga]

why is the j hat in the cross product negative .. i thought we were just supposed to add those cross products but im confused that you put a negative on the j hat but + on i and k. can anyone please explain. thank you