Working out the coeffient of friction?

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Homework Help Overview

The problem involves a ladder resting against a wall and a rough surface, requiring the calculation of the coefficient of static friction based on the ladder's weight, length, and angle of inclination at the point of slipping.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster expresses uncertainty about how to start the problem and seeks assistance. Some participants suggest using a free body diagram to analyze the forces acting on the ladder. Others inquire about the details of the original poster's diagram and where they encountered difficulties.

Discussion Status

The discussion is ongoing, with participants offering to help the original poster by encouraging them to share their work and identify specific points of confusion. There is an emphasis on collaborative problem-solving without providing direct solutions.

Contextual Notes

The original poster mentions that similar problems have appeared on past exams, but they have not covered this topic in class, indicating a potential gap in their understanding of the material.

mm874
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Homework Statement



A ladder of weight 250 N and of length 6.0 m....?
A ladder of weight 250 N and of length 6.0 m rests with its lower end on a horizontal rough concrete surface and its upper end against a smooth wall. If the ladder just starts to slip when the angle between it and the concrete is 550, calculate the coefficient of static friction μ.


Homework Equations





The Attempt at a Solution



Unfortunately I have no idea where to begin. So any help would be much appreciated.
 
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Begin by drawing a free body diagram (FBD) of the ladder.
 
Sorry, I had already done that and am still struggling! This has croppped up on a number of past exam papers but we haven't been through it in class.
 
If you've already done it, show what you did and where you got stuck. We will help you get unstuck and stop struggling.
 

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