What Forces Act on a Hanging Peg?

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Homework Help Overview

The problem involves analyzing the forces acting on a peg that supports a picture via a wire. The context includes considerations of equilibrium and the interactions between the peg and surrounding structures.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the forces acting on the peg, particularly questioning the nature of the upward forces required for equilibrium. There is a focus on the role of the wall in providing support and how it interacts with the wire.

Discussion Status

The discussion is ongoing, with participants exploring the relationships between the forces involved. Some guidance has been offered regarding the interactions between the peg and the wall, but no consensus has been reached on the specifics of the force dynamics.

Contextual Notes

Participants are considering the absence of friction and the implications of the wall's contact with the peg, which may affect the analysis of forces.

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Homework Statement



"A picture is supported vertically by a wire that is looped over a horizontal light peg P. There is no friction between the wire and the peg."

(Please refer to the image attached)

How would the free body diagram of the forces acting on the peg look like?

Homework Equations



None

The Attempt at a Solution



I know there's two forces along the wire coming out from the peg, but how about the upward forces? What provides the upward force to keep the peg in equilibrium?
 

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Besides the wire, what other object is in contact with the peg?
 
The inside of the wall?
 
Yes.
 
But the inside of the wall can act on the peg in any direction. So if the wire acts on the peg in other directions, the inside of the wall will just automatically balance it by acting in the opposite direction?
 
Yes.
 
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