Finding Q(point charge) with an angle, mass, and radii only

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Homework Help Overview

The discussion revolves around determining the static charge on two balls using Coulomb's law and concepts of equilibrium. The problem involves given parameters such as distance, mass, and angle, but lacks a clear question due to the nature of the lab assignment.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the need for additional clarity on the problem statement and explore the relationships between forces acting on the balls, including gravity, tension, and electric forces. There is mention of using vector components to analyze the situation.

Discussion Status

Some participants have provided guidance on starting points, such as drawing free-body diagrams and applying Newton's second law. There is an acknowledgment of the lab's context, but no consensus has been reached on a specific method to solve for the charge.

Contextual Notes

Participants note that the lab does not provide a specific question, and they are working with the data they have been given. The hint regarding the x and y vectors suggests a focus on vector decomposition in the analysis.

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Homework Statement


To find the amount of static charge on the balls using coulomb's law and the concepts of equilibrium.

r = 3.3 cm
m1 = .085g
m2 = .085g
[tex]\vartheta[/tex] = 9.4[tex]\circ[/tex]

Homework Equations



F = K(q1)(q2)\r2

The Attempt at a Solution


I legitimately have no clue how to do this other than the fact that r = 9.4...
Any tips/help will be appreciated.
 
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If you could post the actual question it would be helpful. You simply can't solve that with the information you provided.
 
Sorry...but it's a lab so we don't have an actual question and we apparently have all the data we need. to solve for q.

We have a hint that states, "Remember the key to solving the lab lies in figuring out the x and y vectors."

I'm assuming parts of the vector is composed of gravity, tension, and the electric field which separated the balls from each other.
 
Let me guess: this lab involves hanging two balls side by side from a common pivot point, and measuring the angle that the strings make at the pivot. Yes? If so, start by drawing a free-body diagram for one ball, then writing out Newton's second law for both x and y directions.
 
Yeah, that is exactly the lab we did. Thank you very much! I love this forum now.
 

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