You’re right about the axis it is put as cw not ccw, however in solving he used ccw and what he solved is correct since the origin is at the center, what you got was based of an origin on CD
Thank you for posting all of these for other students, it is incredibly helpful. I wish I had discovered your channel earlier, I am taking Mechanics of materials, Thermodynamics, and Dynamics this semester! Please keep it up you have a gift.
You’re amazing. I’m taking applied strength of materials and using these as review is great. Also learning some things I should’ve already known before
I don't know if it's a point of confusion but if you're wondering which is the cubed term for inertia, imagine bending a ruler through the thin side. It's super bendy, right? Try bending it about the thick side and it will be impossible. For a rectangular cross section, you always cube the dimension that you're bending through.
The solution step is not mathematically sound. Firstly, the formula is not consistent with the derived book formulae. Secondly, the signs of the coordinates are not considered. Thirdly, compression is taken as tensile in some corners, example point A. Getting correct answer (?) does not mean that solution is also correct.
Hey there, it’s because he’s flipping the sign for the second term in each stress calculation. Take stress at A. Clearly, the counter clockwise moment at z axis puts A in compression, but he takes it as tension. Therefore the two swapped signs cancel out and the answer is correct. However I have no idea why he did it this way considering he’s labelling compression sections falsely as in tension.
@@conradthomson7043 Hi there, professor Hanson drew the counter clockwise moment at Z incorrectly- the moment should be drawn the other way around (when looking "down the z-axis" the moment should be counterclockwise but from this isometric view should be clockwise.) The moment on the z-axis puts A into tension, hence it should be positive. An important lesson to draw your moments correctly!
my roommates thinks I'm going crazy because I keep laughing while studying. They don't know that I'm watching the GOAT Dr. Hanson
It seems that from minute 8:00 the z axis from the perspective observer you put down is clockwise not counter clockwise.
I have A as double negative C as double positive and B as + - , D as - +
Thank you for saying this, I thought I was going insane
You’re right about the axis it is put as cw not ccw, however in solving he used ccw and what he solved is correct since the origin is at the center, what you got was based of an origin on CD
Thank you for posting all of these for other students, it is incredibly helpful. I wish I had discovered your channel earlier, I am taking Mechanics of materials, Thermodynamics, and Dynamics this semester! Please keep it up you have a gift.
Wise man's timeless jokes. It gets me all the time
My savior, I couldn't wrap my brain around the bending until this video
Today is my exam and u are my inspiration, how quickly u teaches, where my professor don't 😅
professors profess they dont teach they know nothing about teaching pls accept this
Thank you a lot. You are the admin of teaching.
Wonderful solids lessons!! really taking the time to explain the problems along with a good sense of humor :))
You’re amazing. I’m taking applied strength of materials and using these as review is great. Also learning some things I should’ve already known before
sir ı just wanna thank u saved my life
hope they let me bring a 1$ pool noodle from the dollar store to the exam
Thank you so much. my exam is tommorow and this video cleared up a lot of confusion. it's really helpful
YOU ARE AMAZING SIR!!!
I don't know if it's a point of confusion but if you're wondering which is the cubed term for inertia, imagine bending a ruler through the thin side. It's super bendy, right? Try bending it about the thick side and it will be impossible. For a rectangular cross section, you always cube the dimension that you're bending through.
You're my Hero professor
From korea
Watching This lecture on 27/4/2023 Just wishing if i could take offline classes from you great efforts Sir
amazing sir .😍
Please share formula for resultant bending stress about y and z axis
Old man is nice
The solution step is not mathematically sound. Firstly, the formula is not consistent with the derived book formulae. Secondly, the signs of the coordinates are not considered. Thirdly, compression is taken as tensile in some corners, example point A. Getting correct answer (?) does not mean that solution is also correct.
He's right. That $1 pool noodle is an amazing investment. 10/21/2024
The part where we get "c" confused me
Yes It is the other way around isn't it
why isnt Mz the opposite sign when the equation is -Mzy/Iz + My/Iy
Hey there, it’s because he’s flipping the sign for the second term in each stress calculation. Take stress at A. Clearly, the counter clockwise moment at z axis puts A in compression, but he takes it as tension. Therefore the two swapped signs cancel out and the answer is correct.
However I have no idea why he did it this way considering he’s labelling compression sections falsely as in tension.
@@conradthomson7043 Hi there, professor Hanson drew the counter clockwise moment at Z incorrectly- the moment should be drawn the other way around (when looking "down the z-axis" the moment should be counterclockwise but from this isometric view should be clockwise.) The moment on the z-axis puts A into tension, hence it should be positive.
An important lesson to draw your moments correctly!
You are a life saver🫡