Statics: Lesson 26 - Moment of a Couple in 3D

[@patrickmbongo6838]

I wish I could describe what an amazing engineering professor you are!

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sorry to be offtopic but does any of you know a trick to log back into an instagram account..? I was dumb forgot the login password. I would appreciate any assistance you can give me!

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@@muhammadbrock7877 Yes I know. Private message me

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Thank you Mr.Professor Iam following your online vidios from Afghanistan and as Engineering student I realy gratitude you and such a good explainations of lessons.

[@carsonmcdonald8637]

Feeling way more confident for my final tomorrow thanks to your videos. Awesome teacher

[@victoriaivybarela5967]

i love the way how you make this subject so lightly. Thank you Dr. Handsome.

[@georgesadler7830]

DR. Hanson, thank you for a powerful introduction to Moment of a couple in 3D.

[@chekopacheko9786]

I'm a bit confused in this lecture......why isn't the 35N downward causing a moment if it is perpendicular to the x axis? I'm thinking back to the wrench example where the max moment is perpendicular, so I am confused! Can someone explain please?

[@frankkasundra]

Because the distance between the force and the x-axis is zero

[@flightblinker]

@@frankkasundra Solved the 3-year-old question just in time for me to read it before my exams. Legend!

[@theinquiringengineer]

Maybe I'm just really tired, or I missed something, but when calculating the moment about z caused by the 50N force, how did you determine it was dcos(30) from the z axis?

[@theinquiringengineer]

NVM, it's from the blue triangle method.

[@moatfloater]

I am actually struggling to see it! mainly because the force doesnt seem to be heading out from the origin on an angle.

[@s7vxn]

⁠@@moatfloaterThink of it as a carousel, the horizontal distance from the center (z-axis) to the horses rotating around it can be seen as dcos(30)

[@nathan8472]

we can pick origin to be anywhere on other problems that aren't clear where origin is?

[@BigDaddy-je2nq]

Currently taking a dump 30 min before exam start time, now I’m confident that I’ll pass this shit…

[@christiancarlson227]

shouldnt the distance from the z be 350+250? not dcos30...

[@zunaidhassan9662]

As the distance has to be perpendicular to the force, you imagine the force to be on y-axis and take the distance there from the z-axis, which is dcos30°.

[@RK-tx5xb]

Great Explanation Professor !!

[@mhhhcheese]

god bless this guy i beg

[@blans316]

Thank you for sharing this video!

[@joeking3688]

How does the 50N perpendicular to the x-axis not cause a moment? Seems weird it has a zero moment on the axis. LOL 😅

[@crisen_]

I binge watch this first half of the series

[@senamisosibanda7624]

God sent ! Thank you for rescuing me from the academic trenches

[@randomstuffguy8810]

God bless you sir

[@saberking7397]

Not sure if some of others cannot follow this video like me...( Dr Hanson is awesome it's my issues cannot follow the video!) There is probably a simpler way to do it. We can calculate moment of AB and AC and plus them together, this is the resultant moment which is 20N.m. Then we can get the same answer of d.

[@waynethurman2144]

You were not alone!

[@ethansamson3794]

is the moment about the Z axis dcos30 because Z is technically the K and we want the distance along the x away from the axis? I remember you said for the horizontal we always use the vertical length away and for the vertical we always use the horizontal length away. Please correct me if I am wrong. Your videos are a lifesaver for my class.

[@betterbutter5935]

so it should be 350 aint?

[@alishad9777]

I think you are recalling a 2D way to solve for moments when you speak about the vertical and horizontal distances. What you need to find the moment about the z-axis, is the perpendicular distance from the LOA (line of action) of the force to the z-axis. By extending the 50N force till it crosses the y axis, you can then draw a perpendicular distance to the z-axis. This distance is dcos30. Hope that helps

[@abadyelhertany8604]

@@alishad9777 thank u so much now it is very clear

[@jadinzack9271]

Excellent video thank you

[@janakassem838]

how to convert the moments to vector form

[@DarteySelasi-kq6qx]

I don't understand how 50N is causing moment about y and z when the direction of the force only seems to be in y. How is it causing moment about z?😢😢

[@rajivunome]

Why didnt you square the 20 when solving for d?

[@bestofwa644]

the 20 was squared but the root take it off !

[@hemaanthsivakumar2118]

i love you so much im getting a scholarship thanks boss

[@heh8792]

thank you so much sir,may god bless you and your family

[@josephlutchman5131]

jeff i’m faded and you’re funny asf

[@medicisounds1384]

Not a huge fan of this method. It just confused me more and it seems you can only use it when you are given the Final Moment Magnitudes. If you are not given the Final Moment it does not see like you can get the Moment. Or at least i did not manage to use this method on a different problem and succeed

[@PlaysPlaystation]

why were the 350mm and 250mm given if they weren't needed

[@betterbutter5935]

yeah exactly.i dont know why too

[@zunaidhassan9662]

It's normal for questions to have extra information that are not needed to get the solution.

[@jacobdavis5691]

So I take it the 350 mm and 250 mm quantities are red herrings

[@regulusblack1722]

I feel so weak I can't even imagine the cw thing every time I wanna Guess it I missed it up oh my good god

[@pr.dr.nachtigaller5154]

This was actually the first video of yours I could not follow

[@waynethurman2144]

having trouble myself; first one I have not come to understand

[@danadallal6314]

anyone from UofT>?

[@miathu6937]

Lol yes !

[@davidalbigensechilengi]

0:22 😂

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[@buhyeah69]

Did he say Hilter

[@erljazz6846]

Yes

[@artsyboi5163]

He said Hibbeler. The book he's using is written by Russel C. Hibbeler.