Welcome to the website of ME 274 for the Fall 2008 semester. On this site you can view blog posts, add your own blog posts and add comments to existing posts. In addition to the blog are links to course material: course information, information on solution videos, exams, quizzes, homeworks and other course-related material. Direct links to the homework solution videos are also available on the left side of this page.


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Nov 11, 2008

Problem 6/123

Are we still supposed to be doing problem 6/123 since it was worked during class or was another problem reassigned during class to do instead?
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4 comments:

CMK said...

I goofed. I assigned a problem that was in the lecture notes. Please review the solution of 6/123 from lecture. However, I will not collect that problem.

Sorry for the confusion.

November 11, 2008 at 1:54 PM
Alex Taylor said...

Speaking of confusion. What is the mass moment of Inertia of a rectangle? A thin rod is 1/12*m*l^2, a circle is 1/2*m*r^2, but in the example in class we just left it as Ig+mr^2.

What is Ig?

November 12, 2008 at 12:06 AM
garrettmocas said...

Alex,
In my notes I had Io = IG + md^2, d=sqrt(b^2 + b/2^2), and IG = 1/12*m*(b^2 + b/2^2). I am not sure if this is right or not though.

November 12, 2008 at 8:38 AM
Byron said...

Garret and Alex,
I used Io = Ig + md^2,
Ig = (1/12)*m*(b^2 + (2b)^2)
md^2 = m(b^2+(b/2)^2)

after reducing down, Io = (5/3)*b^3

Its a little late, but I hope it helps.

November 12, 2008 at 11:51 AM

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