Calculating Charge of 3 Identical Point Charges

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Homework Help Overview

The problem involves three identical point charges, each with a specified mass and charge, suspended from strings at a defined angle. The objective is to determine the charge value based on the forces acting on the charges.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the forces acting on the charges, including tension, gravity, and electromagnetic forces. There is a mention of the need for the distance between the charges to solve the problem, with some suggesting the use of Lami's theorem.

Discussion Status

The discussion is exploring various aspects of the problem, including the forces involved and the necessary information for a solution. Some participants have provided guidance on potential approaches, while others are questioning the assumptions regarding distance.

Contextual Notes

There is a note about the age of the thread, which may imply that the discussion has been ongoing without resolution for some time.

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Three identical point charges, each of mass 140g and charge +q, hang from three strings. If the lengths of the left and right strings are each 10 cm, and each forms an angle of 48 degree with the vertical, determine the value of q.
 
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This is a statics problem. The forces acting on one of the point charges are tension, gravity, and electro-magnetism.

Of course, you can't solve the problem unless it let's you know what the distance between the point charges is.
 
NateTG said:
This is a statics problem. The forces acting on one of the point charges are tension, gravity, and electro-magnetism.

Of course, you can't solve the problem unless it let's you know what the distance between the point charges is.

We do know the distances.. Lsin(theta)
 
use lami's theorem on any of the left and right charge, forces being Tension, mg, electric force
 
Realize that this thread is 7 years old.
 

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