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.

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

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

Thanks for existing, these videos are helping me so much

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.

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

Such a great teacher. Amazing ❤

Sir you are the best.

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

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?

@user-bi1ml3jb9p

3 жыл бұрын

I think he did

Amazing

dripped out in the AMG

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

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

jeff ur the best

can you please make another example on distributed loads🙏

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

Professor Hanson, so I am a little bit confused as to which is x-bar for the 1/4 circle, is it 6.79 or 8.09? Thank you for your reply in advance.

@jin-bw2dm

Жыл бұрын

I think 6.79 is the x bar for a full regular 1/4 circle while 8.09 is the x bar for the composite shape (1/4 circle - square) given in this example.

@3467AAA

Жыл бұрын

@@jin-bw2dm thank you, a few hours after I wrote down the example, I realized it. Thank you for confirming it.

@jin-bw2dm

Жыл бұрын

@@3467AAA np :)

wait so how is x=4 9:46?

You’re the best statistic teacher🌹💖

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 ?

@erenarslan8186

2 жыл бұрын

Ok. Now i get it. Formula of the x-bar states the center position of the quarter circle. And the second object is the quarter of the circle , which has part that doesn't exist .

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

@ahmedal-doori2519

2 жыл бұрын

In VT, we use Engineering Mechanics Vol1. Statics by Meriam. I think he's using a very similar one if not the exact same.

@336suryasunkaramech5

2 жыл бұрын

@@ahmedal-doori2519 Hibbler

@dremr2038

2 жыл бұрын

RC HIBBLER STATICS AND DYNAMICS

3:08 why is the x bar region zero

Philippians 4:13

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

@davidbenter8137

3 жыл бұрын

2pi is one complete revoulution and 1pi is half circle pi/2 is quarter circle

@Hope0fHumanity

3 жыл бұрын

Your thinking circumference. Area is pi*R^2

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

Why is x=4 for the square?

@erenarslan8186

2 жыл бұрын

bc it's the coordinate of the squares center

I don't understand, how is x a 4

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

@irvinrodriguez931

3 жыл бұрын

sum means you add it all together, the sum of 3+2-2+1 is 4. b^3 means (base)^3. usually in formulas b is used to represent base of a shape, and h is used to height of a shape.

Dat gummit!

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" ?

@davidc.7305

3 жыл бұрын

He's correct. Remember to put parenthesis around 4r and 3pi when you enter it into your calculator [ i.e. (4*r) / (3*pi) ]. If you just insert it as you just wrote it, your calculator divides everything first by 3 and THEN multiplies it by pi, which will be problematic. Hope this helps.

You’re a god

requires so much attention :/

If you put garbage in this table you get garbage.