Mechanics problem: Ladder on a wall help please

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SUMMARY

The discussion revolves around a mechanics problem involving a ladder resting against a wall, specifically calculating the coefficient of static friction. The ladder weighs 200 N and is 5 m long, positioned at a 40-degree angle with the ground. Participants suggest drawing a diagram to visualize forces, including the normal force, friction force, and weight, to facilitate the calculation of static friction. The problem emphasizes the importance of understanding trigonometric components and moments in solving mechanics problems.

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  • Understanding of static friction and its coefficient
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  • Familiarity with free-body diagrams in mechanics
  • Basic principles of moments and equilibrium in physics
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Students studying physics, particularly those focusing on mechanics, as well as educators looking for practical examples of static friction and equilibrium problems.

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Mechanics problem: Ladder on a wall help please :(

Homework Statement


"A ladder of weight 200n and of length 5m 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 40(degrees) calculate the coefficient of static friction:"

having trouble with trigonometry here, i can do questions where i have lengths but no angle but this one is spinning me out.
 
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Welcome to PF!

Hi learning420! Welcome to PF! :wink:

Draw a diagram showing the normal force form the ground, the friction force, the weight, and the direction of the force from the wall, and take components and moments …

what do you get? :smile:​
 

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