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-EquinoX-

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## Homework Statement

http://img214.imageshack.us/img214/4430/fieldoc3.th.jpg

E = (3.00i+5.00j) x 10^5 N/C the ball is at equilibrium at 37 degrees, the ball has a mass of 1 gram. What is the charge of the ball? What is the tension of the string?

## Homework Equations

E = Fe/q0

## The Attempt at a Solution

As far as I know to solve for this problem Fe must be equal to 0?

Or we should first resolve the forces acting on the ball, which is

T cos(37) - mg = 0.. am I right? I don't know what's next

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