Hi guys, if you would like to view the two part video on the derivation of the flexural formula then please see the links below. We hope you found it informative and helpful. Thank you. Derivation Of The Flexural Formula Part 1 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OEHSbg93xAM.html Derivation Of The Flexural Formula Part 2 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FY2UFxMdg1Y.html