Momentums, Ladder against a wall force

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SUMMARY

The discussion centers on solving a physics problem involving moments and forces related to a uniform ladder leaning against a wall. The key equation used is the moment equation, defined as Moment = Force * Distance moved. Participants clarify that the center of gravity (W) of the ladder is located at its midpoint due to its uniformity, which simplifies the calculations regarding the moments about point Y. This understanding is crucial for accurately determining the forces acting on the ladder.

PREREQUISITES
  • Understanding of basic physics concepts, specifically moments and forces.
  • Familiarity with the concept of center of gravity in uniform objects.
  • Knowledge of how to apply the moment equation: Moment = Force * Distance moved.
  • Ability to interpret and analyze physics problems from written statements.
NEXT STEPS
  • Review the principles of static equilibrium in physics.
  • Study the concept of center of mass in uniform objects.
  • Learn how to apply the moment equation in various scenarios.
  • Practice solving problems involving forces and moments in real-world applications.
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Students studying physics, particularly those focusing on mechanics, as well as educators looking for examples of problem-solving techniques related to forces and moments.

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Homework Statement



http://www.physics.ox.ac.uk/olympiad/Downloads/PastPapers/BPhO_PC_2008_QP.pdf

Question 6

Homework Equations



Moment = Force * Distance moved

The Attempt at a Solution



I have tried this and I am sorry to say that I have no idea how to work it out. I think it is something to do with moments but the centre of gravity is not about a pivot so I don't if I should still reference Y from W. Furthermore, since the exact location of W is not known, I can't just use pythagoras to find the distance of Y from W.

Any help would be great, thank you very much.
 
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Hi Mukilab! :smile:
Mukilab said:
I think it is something to do with moments but the centre of gravity is not about a pivot so I don't if I should still reference Y from W.

uhh? :confused: The question tells you to take moments about Y.

Get on with it!
Furthermore, since the exact location of W is not known, I can't just use pythagoras to find the distance of Y from W.

Read the question … it's a "uniform ladder", meaning that it's the same all the way along …

so W will be in the middle! :wink:​
 

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