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 6/175


Since asked for relationship between change in velocity and change in TIME, need to use impulse momentum equations:
  • sum F_x = f - m*g*sin(theta). Therefore, integral (f - m*g*sin(theta))*dt = m*v_O2 - m*v_O1
  • sum M_O = f*R. Therefore, integral (f*R)*dt = I_O*omega2 - I_O*omega1
Eliminate f from the above equations. Therefore, have one equation in terms of unknowns of omega1, omega2 and v2.

KINEMATICS
Need to relate the velocity of O to the omega for the disk. TAKE NO SHORTCUTS HERE!! If you do, you will probably make a sign error. Use the usual rigid body kinematics equation.

Let us know if you have questions.
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