(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two particles with electric charges Q and −3Q are separated by a distance of 2.5 m.

If Q = 4.9 C, what is the electric force between the two particles?

2. Relevant equations

Coloumb's equation: F=k*q1*q2/r^2

k=9.0*10^9

3. The attempt at a solution

I just tried to plug in the variables into the above equation.

so I got F= (9e9)*(4.9)*(3*4.9)/((2.5/2)^2)

F= 4.15e11

Apparently, that is not the correct answer, but I don't know what I did wrong!

I also tried to divide that number by 2 to get F= 2.07e11 which was also not right.

What am I doing wrong?

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# Homework Help: Finding electric force between two particles

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