Find electric field separating two charged masses suspended on strings

[jay_chay22]

Homework Statement

Two uniform opposite charge with a mass of 2g. has a charge of 5x10^-8 coulomb .The length of the string is 10 cm and the angle is 10°. Find the electric field ?( The answer is 4.43 x 10^5 N/C.)

Relevant Equations

F= qe

Please help me on this question
I have tried to do it many times but I end up getting the wrong answers.
I have show my work what I have done.

 

[gneill]

Hello jay. By forum rules you'll need to show us exactly what you've tried before we can offer help. We need to see what your current understanding of the problem is.

 

[jay_chay22]

Hello jay. By forum rules you'll need to show us exactly what you've tried before we can offer help. We need to see what your current understanding of the problem is.

Can you check it for me what I went wrong ?
This is what I get and it is a wrong answer.

 

[barryj]

I got what you got

 

[gneill]

It would appear that you've not accounted for the interaction between the two charges. One is positive and the other negative, so...

 

[jay_chay22]

It would appear that you've not accounted for the interaction between the two charges. One is positive and the other negative, so...

So can you tell me more information on how to find the answer ?

 

[gneill]

So can you tell me more information on how to find the answer ?

What is the equation for the force between two charged particles? For this problem, in which direction will it act for each particle?