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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Jul 21, 2008

Problem # 6/136

I have got how to do the entire problem except how to come up with the height to use for the potential energy. I am assuming that I will use a point 6" above point A for my datum line, thus making Pe2=0, but that means I need the height the wheel begins at in order to find my initial potential energy. Thanks for any help or thoughts.

Mark
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1 comment:

Seth Chadwick said...

To find the height, you can use point A, but you'll still have to take into account that the wheel is sitting on an incline.

R = 24"
r = 6"
d = 12"
theta = 30

h_1 = R - R*cos(theta)
::height up the curved bottom::

h_2 = d*sin(theta)
::height up the strait section::

h_3 = - (r - r*cos(theta)
::subtracting the difference of G of the wheel due to the incline::

h = h_1 + h_2 + h_3

July 21, 2008 at 10:18 PM

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