What Forces Act on a Hanging Peg?

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The discussion centers on analyzing the forces acting on a peg supporting a picture via a wire. It identifies two forces along the wire emerging from the peg, questioning the source of the upward force necessary for equilibrium. The conversation suggests that the wall's interior can exert forces on the peg in various directions, balancing the wire's forces. Participants explore the dynamics of these interactions, emphasizing the role of the wall in maintaining equilibrium. Understanding these forces is crucial for accurately depicting the free body diagram of the peg.
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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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