Equation for sum of torques on a ladder and minimum angle

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SUMMARY

The discussion focuses on calculating the sum of torques for a ladder in equilibrium, specifically addressing the need to consider all forces acting on the ladder. The participant emphasizes the importance of including the torque generated by the force at the wall, denoted as ##F_{f2}##, in addition to the torques from other forces. This comprehensive approach ensures accurate torque calculations, which are crucial for solving problems related to static equilibrium in physics.

PREREQUISITES
  • Understanding of static equilibrium principles
  • Familiarity with torque calculations
  • Knowledge of free-body diagrams
  • Basic physics concepts related to forces and moments
NEXT STEPS
  • Study the concept of torque in detail, including its calculation and application
  • Learn how to construct and analyze free-body diagrams for complex systems
  • Explore static equilibrium problems involving multiple forces and torques
  • Review the principles of moments and their role in mechanical systems
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Students studying physics, particularly those focusing on mechanics, as well as educators and tutors looking to enhance their understanding of torque and equilibrium in physical systems.

Howard Fox
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Homework Statement


upload_2018-12-3_17-6-53.png
[/B]
upload_2018-12-3_17-10-32.png

upload_2018-12-3_17-13-19.png

Homework Equations


Drawing a diagram for the forces is the easy part. I am not sure I am doing the equation of the sum of the torques well.

The Attempt at a Solution


This is my attempt for the forces[/B]
upload_2018-12-3_17-35-22.png

And this for the torques:
upload_2018-12-3_17-57-34.png
 

Attachments

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Physics news on Phys.org
If you calculate torques about the point of contact with the ground, there are 3 torques to consider not just 2. You missed the torque generated by ##F_{f2}## at the point of contact with the wall.
 

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