you are a combination of a cool dad and a great teacher

I just wanna say, I have probably watched dozens of these videos now between my professors using them and just going back for help. Thank you for all you do! You're very helpful and it's a nice way to learn!

I_2 = (7(1)^3)/12 + 7(10.5-7.85)^2 = 49.74in^4. Yes, In the video it appears that he makes an Algebra Error. for the Final Answers when done correctly I am getting: NetI= 235.13in^4, N.A.= 7.85in., Max Tension = 1.60 ksi, Max Compression = 0.64 Ksi.

@akondor323

Жыл бұрын

yh u right

@eduardomoreira7624

Жыл бұрын

Thank you so much

@svongsa

Жыл бұрын

You’re right

@ameraldas3641

4 ай бұрын

yep I noticed this as well

@jianweixian5562

3 ай бұрын

Ty

Thank you for the help, graduating with my associate's this year and I need to do well on the exam. Your video really helped! Best luck to you and everyone in your future endeavors!

my textbook did nothing for me this week. Read it and had zero idea what was going on. These videos are a life saver!

Wonderful solids lessons!! really taking the time to explain the problems along with a good sense of humor :))

Our professor is making us teach ourselves Mech of Mat, thank you so much for this.

I must say: thank you very much for your fascinating lecture, I am addicted to it 。

For the middle calculation for Ix' I got [(1/12)(7)(1)^3]+7(2.65^2)= 49.74. Am I doing something wrong?

@zaintariq3135

4 жыл бұрын

I think Jeff made a mistake there. You did it right.

@stevemaldonadomelendez1790

3 жыл бұрын

Yeah, I believe it was just a simple algebra mistake. Thank God computers do the algebra for us in the field.

@cercibabes9040

3 жыл бұрын

Yeah he just made a mistake and got 7 instead of 10.5 you are correct sir

The whole time I looked at the beam section as if it is a side profile and so it never made sense to me. You are literally the only one that explained (with your hands) how the moment acts on the beam, and now all makes so much sense. Out of all my course mates (about 240 people) nobody knows this. Bad students or a bad teacher? Nevertheless, I you have thanks!

Thank you I’m reviewing this for my mechanical design class

I need help with regular stresses, shear and cornering, and the transfer of regular or clipping force from the permissible to his cross section. Thank you.

You are the best lecture... Thank you sir very much..

Thank You! Hopefully this helps on my exam

I love you jeff! have a beautiful existence!

Hello from Turkey professor, you are the grandmaster !!

Thank you so so much!

Thank You!

love u sir,from the another side of the earth

Bro just saved me time of reading 5 weeks of work

Thank you so much :D

Seriously the goat

Man this guy is GOATED

Thank you man

What a lovely way of explaining ❤ love u sir From pak

sir for Inertia of Area 2, it should be 49.74 in^4...

@bradvincent2586

3 жыл бұрын

yes I agree

Wise old man.

شكرآ

MVP!

Why does the end blur out and the sound go away?

T-beam, what is the Top (Tension) and bottom (compression) will be if we bend the shape in an opposite direction downwards, not upward as illustrated?

@J-Stew_64

Жыл бұрын

yes

2:41 for cat meow

How do you know which side is in compression or in tension, I cannot visualize it

@connoraustin8434

2 жыл бұрын

Material towards the bottom has to get longer as the surface is stretched due to the direction of the moment applied thus in tension. Material towards the top is being squeezed together due to the direction of the moment thus compressive.

While he is calculating the second line of Ix', he pressed on his calculator the buttons 9 then 8 for 2.98^2 instead of pressing 6 then 5 for 2.65^2 that is simply what happened with him.

** one of the Ixx answers is wrong. 62.87 should be 49.7

sir ,for bar 3 & 4 is it not y=10 inches ?

@mythri7345

4 жыл бұрын

yeah it should be

@DaftDriver

4 жыл бұрын

The height from the base to the top is 11 inches, and the centriod of parts 3,4 is 1.5 so 11-1.5=9.5

shouldn't compression stress be -.609 ksi? not positive

@tbenvo24

4 жыл бұрын

Labeling it as compressive is equivalent to using a negative sign. So if you labeled it as compressive and used a negative sign that would actually mean positive (tensile). I hope this helps

why doesn't d come out negative in a*d^2? pretty sure 7.85-10.5 comes out negative

@nimdanilox7783

Жыл бұрын

yes but a square always results positive

You'd have to reconsider your degree if you're disliking these videos.

can centroid be smaller than the y

@engineeredchannel5649

11 ай бұрын

Not sure what you are asking here?

there is a mistake, it is 49.74 not 62.87.

Thank you Jeff.

Your answer is wrong