Solving Tension in a Cable Homework

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Homework Help Overview

The discussion revolves around determining the tension in a cable, specifically focusing on equilibrium conditions and torque equations. The original poster expresses difficulty in finding the tension 'T' and understanding the related concepts in the context of a physics problem involving forces and torques.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the application of torque equations and equilibrium conditions. The original poster attempts to set up equations based on torque but struggles with the broader concept of equilibrium. Others inquire about additional conditions necessary for equilibrium and suggest reviewing previously mentioned equations.

Discussion Status

Some participants have provided hints and guidance regarding the equilibrium conditions and the setup of equations. The conversation reflects a mix of attempts to clarify concepts and explore different aspects of the problem, with no clear consensus reached yet.

Contextual Notes

The original poster has indicated that they have been working on other topics, which may affect their focus on this problem. There is also mention of a specific angle (60 degrees) in the context of the tension equations, suggesting that certain assumptions or parameters are being discussed.

datphysics
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Homework Statement


Im having trouble understanding how to find the tension 'T' and pretty much answering the question on the .jpg file i have attached


Homework Equations


ƩFx=0, ƩFy=0, τ=r x F


The Attempt at a Solution


For question 17 i have:
TLsinθ - w(l/2cosθ)-w(Lcosθ)= 0 (*because net sum of torques =0*)

And for question 18 i have no attempts at the question haha.

Help would be much appreciated!
 

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  • question 17,18..jpg
    question 17,18..jpg
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datphysics said:
For question 17 i have:
TLsinθ - w(l/2cosθ)-w(Lcosθ)= 0 (*because net sum of torques =0*)
Good. That will give you the tension. What about the other conditions for equilibrium?
 
Umm i have no idea what are the other conditions of an equilibrium are..
 
datphysics said:
Umm i have no idea what are the other conditions of an equilibrium are..
You posted them under "Relevant Equations". :smile:
 
Sorry for the delayed reply but i have completed number 18 but have not completed 17 (been doing other topics, anyways back this topic).

The next part should be: (But I am not sure how haha)
3.TLsin60-3/2WLcos60 = 0
 
Last edited:
datphysics said:
Sorry for the delayed reply but i have completed number 18 but have not completed 17 (been doing other topics, anyways back this topic).

The next part should be: (But I am not sure how haha)
3.TLsin60-3/2WLcos60 = 0
Show your equations for ƩFx = 0 and ƩFy = 0.

Hint: Label the force components exerted by the pivot as Px & Py. You'll solve for those components, of course.
 

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