Electric Charges, Electric Forces and Electric Fields

  • Thread starter hirschy
  • Start date
  • #1
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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
 

Answers and Replies

  • #2
32
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Which formula can be used to find the strength of the electric force due to the field?
 
  • #3
7
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Electric field = Electric force/ q (charge of object)
 
  • #4
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(Electric field equals the electric force divided by the charge of the object)
 
  • #5
32
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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?
 
  • #6
7
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F= mg
 
  • #7
7
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Force of gravity = mass x 9.8
 
  • #8
32
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Bingo
 
  • #9
7
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Wow thanks! haha I may have some more questions soon too :)
 

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