Calculating shear in a cantelever

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The discussion focuses on calculating shear in a cantilever beam using a specific equation involving shear force, statical moment of area, moment of inertia, and material thickness. Key terms such as "moment of inertia of cross-sectional area" and "statical moment of area" are questioned for clarification. The user provides dimensions for a rectangular beam and a cylindrical cantilever to illustrate their inquiry. There is a suggestion to clarify the problem being addressed, especially if it pertains to homework, and to repost in the appropriate section. Overall, the conversation emphasizes the need for a clearer understanding of the terms and calculations involved in shear analysis.
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The equation is: (Shear force*Statical 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 "statical 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.
 
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