Shear stress strain diagram

[@caveman601]

Great video!

[@AlphaAussies]

i need a video with conversations ): this was my exact problem except instead of kips it was kN and instead of in its mm

[@joelromero8445]

I don't understand why the area is 1/4 pi r ^2.
Can someone explain why there's a 1/4 please?

[@akshaycv398]

Area of circle is pi/4 *diameter²