92_Problem CHAPTER 9 - PROBLEM 9.80 Determine the moments...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
PROBLEM 9.80 Determine the moments of inertia and the product of inertia of the area of Problem 9.72 with respect to new centroidal axes obtained by rotating the x and y axes 45° clockwise. SOLUTION From the solution to Problem 9.72 4 501.1875 in xy I = 2 2 3 20.25 in A A = = First compute the moment of inertia ( ) ( ) ( ) ( ) ( ) 1 2 3 2 3 with x x x x x x I I I I I I = + + = ( )( ) ( )( ) 3 3 1 1 12 in. 9 in. 2 9 in. 4.5in. 12 12 = + ( ) 4 4 729 136.6875 in 865.6875 in = + = and ( ) ( ) ( ) ( ) ( ) 1 2 3 2 3 with y y y y y y I I I I I I = + + = ( )( ) ( )( ) ( ) ( ) 3 3 2 2 1 1 9 in. 12 in. 2 4.5 in. 9 in. 20.25 in 9 in. 12 36 = + +
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern