Electric Charges, Electric Forces and Electric Fields

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Homework Help Overview

The problem involves an object with a specified net charge placed in a uniform electric field, seeking to determine its mass while it floats in the field. The subject area includes concepts of electric forces, electric fields, and gravitational forces.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the relationship between electric force and electric field, with some questioning which formula to apply for calculating electric force. There is an exploration of how to equate electric force to gravitational force for the floating object.

Discussion Status

Participants are actively engaging with the problem, sharing relevant formulas and clarifying concepts. There is a productive exchange regarding the necessary calculations, though no consensus has been reached on the complete solution.

Contextual Notes

Some participants express uncertainty about the acceleration and the specific formulas needed for the calculations, indicating a need for further clarification on these points.

hirschy
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Homework Statement



An object with a net charge of 24 x 10^-6 Coulombs is placed in a uniform electric field of 610 N/C, directed vertically. What is the mass of this object if it floats in this electric field?

Homework Equations



Felectric = kC (q*q/r^2)
Electric Field= kC (q/r^2)
E= Felectric/q
F=ma

The Attempt at a Solution



I know I need to use F=ma, but I do not know the acceleration. I don't know how to solve this
 
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Which formula can be used to find the strength of the electric force due to the field?
 
Electric field = Electric force/ q (charge of object)
 
(Electric field equals the electric force divided by the charge of the object)
 
Once the electric force is calculated, it must be equal to the gravitational force since the charge is floating. What formula is used to calculate the gravitational force acting on a mass?
 
F= mg
 
Force of gravity = mass x 9.8
 
Bingo
 
Wow thanks! haha I may have some more questions soon too :)
 

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