Torque, finding max distance, vertical/horizontal components

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SUMMARY

The discussion focuses on solving a physics problem involving torque and forces acting on a uniform horizontal bar pinned to a vertical wall. The bar has a length of 4.0 m and a weight of 142 N, supported by a wire at an angle of 27° with a maximum tension capacity of 570 N. The key questions involve determining the maximum distance a mass (303 N) can be placed on the bar without breaking the wire, as well as calculating the horizontal and vertical components of the force exerted by the pin at the wall. The solutions require applying principles of static equilibrium and torque analysis.

PREREQUISITES
  • Understanding of static equilibrium in physics
  • Knowledge of torque and its calculation
  • Ability to resolve forces into horizontal and vertical components
  • Familiarity with free-body diagrams
NEXT STEPS
  • Study the principles of torque and equilibrium in physics
  • Learn how to draw and analyze free-body diagrams
  • Explore the concept of tension in cables and its limits
  • Practice solving problems involving forces on beams and supports
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This discussion is beneficial for physics students, educators, and anyone interested in understanding the mechanics of forces and torques in static systems.

Maimunky
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I have three questions left to do and its been very hard because I am out of state with the family and had forgotten to pack my physics book. I really need help on this, I can't find any examples from typing in parts of the question. If you could help me on how to solve this and the equations used, I'd really appreciate it.


1). A uniform horizontal bar of length L = 4.0 m and weight 142 N is pinned to a vertical wall and supported by a thin wire that makes an angle of θ = 27° with the horizontal. See figure 9-52 in the book A mass M, with a weight of 303 N, can be moved anywhere along the bar. The wire can withstand a maximum tension of 570 N. What is the maximum possible distance from the wall at which mass M can be placed before the wire breaks?

2.)A uniform horizontal bar of length L = 4.0 m and weight 142 N is pinned to a vertical wall and supported by a thin wire that makes an angle of θ = 27° with the horizontal. See figure 9-52 in the book A mass M, with a weight of 303 N, can be moved anywhere along the bar. The wire can withstand a maximum tension of 570 N.With M placed at this maximum distance what is the horizontal component of the force exerted on the bar by the pin at A?

3). The third question is similar to the second but asks for vertical component.
A uniform horizontal bar of length L = 4.0 m and weight 142 N is pinned to a vertical wall and supported by a thin wire that makes an angle of θ = 27° with the horizontal. See figure 9-52 in the book A mass M, with a weight of 303 N, can be moved anywhere along the bar. The wire can withstand a maximum tension of 570 N.With M placed at this maximum distance what is the vertical component of the force exerted on the bar by the pin at A?
 
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Welcome to PF!

Hi Maimunky! Welcome to PF! :smile:
Maimunky said:
… I can't find any examples from typing in parts of the question. If you could help me on how to solve this and the equations used, I'd really appreciate it.

You'll have to start doing questions without books to work from, sometime :wink:

now's as good a time as any! :biggrin:

draw a diagram, use all the tricks you know (taking horizontal or vertical components, taking moments, …), and see if anything works …

start with 1), and show us what equations you get :smile:
 

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