Equilibrium from the ceiling. Solve using cosines

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Homework Help Overview

The discussion revolves around a problem involving the equilibrium of a hanging rod, specifically focusing on the geometry and angles related to its center of mass and point B from which it is suspended. The subject area pertains to physics concepts related to equilibrium and trigonometry.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the location of the center of mass of the rod in relation to point B and discuss the implications of this positioning on the angles involved. There is a focus on understanding how to utilize this information to determine the angle the rod makes with the horizontal.

Discussion Status

The discussion is ongoing, with participants providing insights and seeking further clarification on how to approach the problem. Some guidance has been offered regarding the geometric relationships involved, but there remains uncertainty about the next steps and the overall direction of the solution.

Contextual Notes

Participants are navigating the constraints of the problem setup, including the specific configuration of the rod and the angles involved. There is an emphasis on drawing diagrams to aid in visualizing the problem, which may be a requirement for the homework.

tigerwoods99
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thanks
 
Last edited:
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Where is the center of the rod located, relative to point B?
 
I'm sorry!
 
Last edited:
Yes, I realize that the rod is opposite to angle B. The question was meant to give you a clue about the configuration. So more specifically, what do we know about where the center-of-mass of the hanging rod is located, relative to the point B from which the rod and strings are hung?
 
I think the mg of the rod is located directly underneath point B where it is hung from the ceiling
 
Yes, exactly. You can use that information to figure out the angle the rod makes with the horizontal.
 
Ok. so knowing that does angle B "split" into two halves. I am still not sure where this is taking me.!
 
Draw a vertical line from B to the rod center. The triangle is split into two smaller ones. Solve either of the smaller triangles.

Good luck!
 
Ok thanks! I think i still need a little more guidance on this though. What will this solve? How will this help find theta?
 
  • #10
The key is to find the triangle's angle located at the center of the rod. If you haven't already, draw a figure including the vertical line between B and the rod center.
 
  • #11
Ok. thanks
 
Last edited:

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