Problem 9-51 Determine (a) principal stresses and (b) maximum in-plane shear stress by Mohr's Circle 

This video explains in detail the solution to Problem 9-51 in the Chapter of Stress Transformations from the book Mechanics of Materials by R.C. Hibbeler 10th Edition, where the principal stresses and maximum in-plane shear stress are calculated by using Mohr's Circle.
The solution to Problem 9-51 is available in PDF and can be obtained on request at solved.civil@gmail.com.
Reference: Chapter No. 9 Stress Transformation, Mechanics of Materials by R.C. Hibbeler 10th Edition.
Statement of the problem:
Determine (a) the principal stresses and (b) the maximum in-plane shear stress and average normal stress. Specify the orientation of the element in each case.
For an explanation of any Problem, the request can be made at solved.civil@gmail.com.
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