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




Some thoughts on this problem.

The problem asks for us to find the reaction force on the wheel due to the supporting, curved surface. This suggests that the NEWTON/EULER formulation is to be used:
  • sum F_x = f = m*a_Gx
  • sum F_y = N - mg = m*a_Gy
  • sum M_G = f*R = I_G*alpha
with KINEMATICS of:
  • a_G = vdot_G*i + (v_G^2/rho)*j
  • a_G = a_C + alpha x r_G/C - omega^2*r_G/O
From these kinematics, you see that we need to know the omega for the wheel. To get omega, you should use the WORK/ENERGY equation for the wheel (change in speed vs. change in position).

Let us know if you have questions.
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