Hello -(adsbygoogle = window.adsbygoogle || []).push({});

I worked out this problem but I got a wrong answer.

First, I used the Pythagorean theorem to find the radial distance between A and each charges. So 1.2m divided by 2 (= 0.6), then the square root of .6 squared + .6 squared = .849, which is the radius.

Then I used Coulomb's Law to calculate the net force:

kqAq1/R2 + kqAq2/R2 + ... and so forth.

I took out the kqA/R2, which is the same for all, and came up with:

kqA/R2 (q1 + q2 + q3 + q4).

But it so happens that the numbers inside the parenthesis turns out to be 0.

What did I do wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electric Charge

**Physics Forums | Science Articles, Homework Help, Discussion**