Trouble Solving a Ladder Problem: Need Help!

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SUMMARY

The discussion revolves around solving a physics problem involving a uniform ladder resting against a frictionless vertical wall, with a static friction coefficient of 0.3. The key question is determining the smallest angle at which the ladder remains stationary. The user has established the relationships between static friction (fs), normal force (Fn), and weight (w), but struggles to connect these concepts to the torque equilibrium condition. The solution requires applying the principles of static equilibrium and torque analysis.

PREREQUISITES
  • Understanding of static friction and its coefficient
  • Knowledge of normal force and weight in physics
  • Familiarity with torque and equilibrium conditions
  • Basic concepts of forces acting on inclined planes
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  • Study the principles of static equilibrium in physics
  • Learn how to calculate torque and its role in rotational motion
  • Explore problems involving inclined planes and friction
  • Review the relationship between forces and angles in static systems
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Students studying physics, particularly those focusing on mechanics, as well as educators and anyone interested in solving problems related to static equilibrium and friction in real-world applications.

naeblis
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hey I've been trying this problem and any way i try i always seem to not have enough info i think I am missing a keyconcept to help get more info outa the problem, well ne way here is the question

Q: A uniform ladder rests against a frictionless vertical wall. the coefficient of static friction = 0.3. what isthe smallest angle at which the ladder will remain stationary?

alli have comeup with is that fs / Fn = .3 and that summation Fx = 0 = fs -F1 ;fs = F1 and Fn-w = 0 so Fn = weight

im not really sure how any of this relates to the other stuff, hopefully some one can help me out on this.

thanx in advance.
 
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Don't forget that the torques about any point must also sum to zero.
 

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