Circular motion: ring on string

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Homework Help Overview

The discussion revolves around a problem in circular motion involving a ring on a string, focusing on the forces acting on the ring and the relationship between angular velocity, tension, and gravitational force.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to derive the relationship between the forces acting on the ring, particularly questioning the role of the tension and gravitational force. There are discussions about the expression for tan a and the constants involved.

Discussion Status

The conversation includes various attempts to clarify the forces involved, with some participants questioning the assumptions made about the forces acting in the vertical direction. There is an indication that some guidance has been provided regarding the total force acting on the ring.

Contextual Notes

There appears to be confusion regarding the correct formulation of the forces, particularly in how they relate to the angle and the constants involved in the equations. Participants are encouraged to share their work for further clarification.

Faiq
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Homework Statement


4c84ed5f4c844877969b916c48f467f0.jpg

Homework Equations


F = mw^2r
[/B]

The Attempt at a Solution


For part a, I can't get the constant of half with the tan a
I am getting tan a = w^2l/g
 
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Post your work. What force do you use to compensate ##mg## ?
 
Faiq said:
For part a, I can't get the constant of half with the tan a
I am getting tan a = w^2l/g
Show how you got that.
 
Think carefully what is the total force acting in the y-axis on the ring. Its not ##T\cos{a}-mg## as you probably think. It is rather ##T(1+\cos{a})-mg## (why??)
 
I did it thanks guys
 
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