GATE CE 2014 Set 2 — Question 18
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Structural Engineering → Statics & Rigid Bodies → Moment of Inertia
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Question
Polar moment of inertia (), in , of a rectangular section having width, and depth, is ________________
Correct answer
40 to 40
Solution
The second moment of area about the x-axis () and y-axis () for a rectangular section are given by:The polar moment of inertia () is the sum of the moments of inertia about two perpendicular axes in the plane of the section:
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