sir ,I have a. doubt there should be dy in place of dx and y in place of x because of the particular directions of x and y axis.when you will go in x direction the distance should me measured in terms of x and same for the y direction
It's not wrong. Common practice is that x is horizontal but that does not preclude it from being anything you want it to be. In fact, the tutor has labeled the x axis to be horizontal. However, it does not help first time learners to label the distance from the centroid axes to the elemental area, x which gets confusing. x' maybe more suitable or even better, something like h. I found the way you explain second moment for a thin vs wide object useful and it shows the significance of second moment. Definitely makes more sense now. As a suggestion, I think you can probably explain it better. Perhaps, doing just that -> give two examples, one where b>>h, and one b
The tutor is very very WRONG . . .Why ? The Xs are not the same thing that the Ys. Teaching mixing them is a very huge mistake. . . . Everybody knows it. We aren't GENIOUS.
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What I'm asking is how did the first formular come about. The integral of y squared d A
sir ,I have a. doubt
there should be dy in place of dx and y in place of x because of the particular directions of x and y axis.when you will go in x direction the distance should me measured in terms of x and same for the y direction
Thanks mate. Helpful stuff
erripuku la cheppavu. nice broo
You've confused your axis. X is left of the and right running horizontally. Same goes for dx. Your diagram is showing Y and dy. vertical is Y.
It's not wrong. Common practice is that x is horizontal but that does not preclude it from being anything you want it to be. In fact, the tutor has labeled the x axis to be horizontal. However, it does not help first time learners to label the distance from the centroid axes to the elemental area, x which gets confusing. x' maybe more suitable or even better, something like h. I found the way you explain second moment for a thin vs wide object useful and it shows the significance of second moment. Definitely makes more sense now. As a suggestion, I think you can probably explain it better. Perhaps, doing just that -> give two examples, one where b>>h, and one b
Please consider the right axes.
The tutor is very very WRONG . . .Why ?
The Xs are not the same thing that the Ys. Teaching mixing them is a very huge mistake. . . . Everybody knows it. We aren't GENIOUS.
Genius #correction.
REEEEEEEEEEEE
erripuku la cheppavu. nice broo