Reaction Force of Rod at 90 and 180 Degrees

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Homework Help Overview

The discussion revolves around a uniform rod of mass m and length L that is free to rotate in a vertical plane about a horizontal axis at one end. The problem involves determining the hinge reaction at the axis of rotation when the rod is at angles of 90 degrees and 180 degrees after being released from rest with a slight clockwise displacement.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the conservation of energy and the moment of inertia in relation to the kinetic energy of the rod. There are attempts to derive the velocity of the center of mass and the hinge reaction, with some questioning the consistency of units and the correctness of the equations used. Participants also explore the direction of forces and accelerations acting on the rod.

Discussion Status

The discussion is ongoing, with participants providing guidance on the equations and concepts needed to find the hinge reaction. There is a recognition of mistakes in previous calculations, and some participants are encouraged to show their work for further clarification. Multiple interpretations of the forces and directions are being explored.

Contextual Notes

Participants are working under the constraints of homework rules, which may limit the information shared. There is a focus on ensuring the correct application of physics principles without providing direct solutions.

  • #31
Kishlay said:
May=Mg-Hy

That will work if you're taking your positive y-direction downward.
 
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  • #32
ok fine will work on it...
 

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