Finding Force Needed to Climb Wall: Friction Coefficient u & Angle @α

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Homework Help Overview

The problem involves a man attempting to climb a wall by pushing against it at an angle, with a focus on the forces acting on him, particularly the role of friction. The subject area relates to mechanics, specifically the analysis of forces and friction in a climbing scenario.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the type of friction involved, questioning whether it is static or kinetic. There is also an exploration of how friction acts along surfaces and the implications of the angle at which the man is pushing.

Discussion Status

The discussion is active, with participants raising questions about the nature of friction and its direction relative to the forces acting on the man. Some guidance is offered regarding the need to visualize the forces through sketches, but no consensus has been reached on the specifics of the friction type or its effects.

Contextual Notes

Participants are considering assumptions about the friction coefficient and the angle of application, which may influence the analysis of forces. There is an indication that the problem may involve complexities related to static versus kinetic friction.

paras02
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Homework Statement


A man standing in the corner of the wall tries to climb up
by pushing against both the walls, if the friction coefficient between the wall and his elbow is 'u' , then find the minimum force from which the man must push against in order to climb up the wall, given that he is pushing the wall at an angle @ ( alpha )?



Pls help me with the direction in which friction and all other forces are acting...
 
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What kind of friction is involved here: static or kinetic?
 
I think it's fair to assume static or at least static = kinetic, else the man has a serious problem.
 
So friction always acts along a surface - so sketch one of the surfaces and put an arrow on it indicating which way the man is pressing (at an angle remember). Which way does the static friction have to act to stop the man from sliding?
 

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