Statics: Lesson 38 - Intro, Centroids by Composite Shapes, Table Method

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[Happydayz-]

We studied this topic for about 5 minutes in my statics class, so in solids I was completely lost. I am totally binging on your videos.

[ratzax]

Thank you very much i got a 55% on an exam worth 25 % than found your videos and got an 97% on an exam worth 50% of my grade all thanks to you

[carsonhenry]

You're videos are saving my life through statics thank you so

[georgesadler]

Professor Hanson, thank you another awesome lecture on Centroids by Composite Shapes. The Table Method really makes this problem easy to solve.

[bodiielectriic]

Thanks for existing, these videos are helping me so much

[yusufrahimat]

Sorry but why is the x-bar origin zero???

[nicholasbattista]

Mr. Hanson: I would like to see and hear you discuss and analyze gusset plates as a true substitute for the pinned connection in trusses, in terms of moments developed on the plate vs the pin. I'm thinking of the I35 Bridge that collapse, where the gusset plate failure (poor design blamed) was cited as one of the reasons for the bridge's failure.

[jdp]

Thanks, using this for FE exam review. In the FE handbook, it says the area for a circular sector is A= r^2*theta where theta is in radians. This is (pi/2)*16 in^2 = 402 in^2. The centroid of X matches the result in the video though. [centroid of x = (2r/3) * sin(theta)/(theta).] Did you make a mistake with the area?

[kukuyiehalem]

Quick question why is it 1/3 of the length on y2

[ngoatomagane]

can you please make another example on distributed loads🙏

[wshuhao]

Amazing!! I have struggled with statics for a long time😭

[lungelomteshane]

when calculating X for the 1/4 circle, why didnt we x0.5 the formula of (4R/3p)??

[erenarslan]

Hey ! Can somebody explain to me, whats going on in the second question ? We got 2 parts. One of them is the square that doesn't exist and other one is a weird object. Prof. give them numbers. And he calculated the x-bar and the area of the second object. But he calculated the area as a quarted of a circle. Shouldn't it be equal to -> pi*R*R/4 - 64 And if not why ?

[aryarijal]

I don't understand, how is x a 4

[davidbenter]

Thinking the area should have Pi/2 for a quarter circle.

[Durgrim_]

hi Mr Hanson, what's the name of the textbook you're using?

[ImranKhan-tuix]

Me finding centroid of composite shape i have quarter curve of circle and to straight lengths
( curve) looking for y centroid I watched videos what is area of the circle circumference volume then I made full circle c= pie×d and divide by 2 made him semi then divided by 2 made him quarter now I have radius 50 and arc 78 I half arc answer is wrong I half 50 my answer wrong kept thinking inbetween I tried moment and x and trying to differentiate but no answer watched more videos then found video she was doing composite shape there was circle in shape I found out that she turn pages and last page they given formulas for quarter circle y and x that is 4r/3y for each 😇😇😇 then I tried what formula she used but answer were close 21 but not correct which was 18 🤦‍♂️ then I Google formulas then I found out that formula for x and y centroid components is 2r/pie

[alexbeaulieu]

what does sum mean? and what is that b^3 mean ? and how do i do?

[martinpartida]

is it just me or does the x of the second part's math is off for me, I noticed that he said 4*16 divided by 3 divided by pi is 6.79 when looking at the textbook, shouldn't it be 4*16/3*pi, therefore, x from part 2 would have been 67.02" ?

[viviankamanga]

If you put garbage in this table you get garbage.