Suspended Painting: Finding Its Weight

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Homework Help Overview

The problem involves a painting suspended by two identical silk ropes at an angle of 120º, with each rope exerting a force of 400 N. The original poster seeks assistance in determining the weight of the painting based on the forces acting on it.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants suggest drawing a diagram to resolve the forces into their x and y components, noting that the system is in equilibrium. Questions arise about whether the resultant of the forces corresponds to the weight of the painting.

Discussion Status

Some guidance has been offered regarding the resolution of forces and the concept of equilibrium. Multiple interpretations of how to relate the forces to the weight are being explored, but there is no explicit consensus on the approach to take.

Contextual Notes

The original poster has indicated that they have already calculated the combined force of the ropes but are unsure about the formula needed to find the weight of the painting.

ignacioserra
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Homework Statement



A painting hangs from two identical silk ropes that form an angle of 120º. Both ropes make forces of 400 N each to keep it in place.

Homework Equations



a. Find the combined force of both silk ropes.(I have already done it)
b. How heavy is the painting?(need help in this one)

The Attempt at a Solution


I don't know what the Formula I have to use, to resolve the second one.
 
Last edited:
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Welcome to PF.

I think you will want to draw a picture yourself and resolve the forces on the ropes into x,y components.

Since everything is in equilibrium then the horizontal forces will cancel and be equal. The vertical force components then must support the weight.
 
is the resultant of both forces equal to the weight?
 
ignacioserra said:
is the resultant of both forces equal to the weight?

That would be another way to do it.
 

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