Calculating shear in a cantelever

[Hadron]

The equation is: (Shear force*statistical Moment of area)/(moment of inertia of cross-sectional area*thickness of material perpendicular to shear). Let's call it a point force. The questions I have is: what is the "moment of inertia of cross-sectional area" & what is the "statistical moment of area"? Let's consider it a beam that is 5*3*4, Length, height, width (respectively)? Also, how would you calculate the shear in a cylindrical cantilever: what is the "thickness of material perpendicular to shear? Let's say it has a radius of 12" and is 12'? Thanks! (Our school doesn't do this lab) Just threw in those numbers so there's no ambiguity.

 

[Nidum]

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