Euler' s equations and tau = zero?

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Homework Help Overview

The discussion revolves around a uniform circular disk constrained to rotate with a constant angular speed about an axis inclined to its axis of symmetry. Participants are exploring the implications of the torque being assumed as zero in relation to Euler's equations and angular momentum.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the significance of the assumption that torque is zero and how it relates to the application of Euler's equations. There is a request for clarification on the problem statement discussed in class and the nature of the torque involved.

Discussion Status

The discussion is ongoing, with some participants seeking more information about the professor's approach and the specific problem solved in class. There is a recognition of the need for clarity regarding the assumptions made, particularly concerning the torque.

Contextual Notes

Participants note that the original problem involved assumptions made by the professor, particularly regarding torque being zero, which may affect the interpretation of the results. There is an emphasis on the need for more context to fully understand the implications of these assumptions.

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A uniform circular disk of mass m and radius a is constrained to rotate with constant angular speed omega abotu an axis making an angle theta with the disk' s axis of symmetry. Find the magnitude and direction of the angular momentum L and the torque tau exerted on the disk by its supporting axis. Give a physical interpretation of your answer.

We had doen a similar thing in class but the professor assumed that tau = 0 for some reason and then went on to get some precession related stuff. Do I follow the same steps(using Euler' s equations as he did) and if so what is the significance of the tau being zero?
 
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Come on ..something anything would be great.
 
It would be useful if you post some of what your professor did (in particular: what was the statement of the problem he solved in class?, and what is this "tau" you mention?). The most info you give, the better.
 
The assumption was that tau = 0 and from there, the Euler equations were solved and they gave a frequency. Along with that there was a few steps to show what omega was and that was about it really, I did not see anything special besides that.
 

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