Coulomb's Law (6 of 7) Force from Three Charges Arranged in a Triangle

How to use Coulombs law to calculate the net force on one charge from two other charges arranged in a triangular shape.
Coulomb's law states that the magnitude of the force between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. If the sign of the charges is the same, both positive or both negative, then there will be a force of repulsion between the charges. If they have the opposite sign then there will be a force of attraction between the objects. The force is along the straight line joining the two charges. The SI unit for the force is the newton.

The force between the charged bodies at rest is commonly known as the electrostatic force. Coulomb's law is an inverse-square law and is similar to Isaac Newton's inverse-square law of universal gravitation, but gravitational forces are always attractive, while electrostatic forces can be attractive or repulsive.

The law is named after the French physicist Charles-Augustin de Coulomb who first discovered it in 1785. The SI unit for electric charge was named after him.

[noelamini]

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[UlviBektashi]

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[mography]

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[garrettstandifird]

For once in my entire 21 years of living, I am finally starting to understand physics. Thank you!

[stepbystepscience]

Why was the free electron so sad? It had nothing to be positive about!  Ha Ha Ha!

[glennmeeker]

Thank you so much, I just began physics 2 and I want to get a good understanding of the basic principals of electric forces, since the remainder of the lessons build on these concepts.

[emmyisabel]

after spending a really long time trying to find out how to get the solution to the same question with different values, yours was definitely the most helpful! thank you!

[Shackled]

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[ca]

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[davebrabner]

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[noelamini]

This should work for an equilateral triangle too right?

[bellaconag]

Good Day! When given Q1 & Q2 have different values, What if F32 is not equal to F31, How can you compute F total?

[_xyfaith]

Where did you get the 37°?
What I mean is that, how can I find it, if that is not given or shown in the problem?

[TheShanaList]

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[ALittleBitOfHotchPotch]

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[bellaconag]

Given: q1= 3nC, q2=2nC, q3= 6nC, same figure as your illustration here. What is the magnitude and direction of the electric force acting on 6nC. Dist between 2 charges is Square root of 2. thank you so much

[jaynelastname]

This video helped me tremendously!   Now I have to have my son watch it ( I don't like having to relearn stuff from 30 yrs ago lol)

[rahulkushwaha]

sir, i wanted to know what woul be the force on EACH ELECTRON  if the Q3 was positive(+) 

[mattg]

Thanks, Brian. I'm in second semester of general physics and this has been very helpful.

[abdirahmanhussein]

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