Please help me on this problem...

[aznknightz17]

The drawing shows an equilateral triangle, each side of which has a length of 3.77 cm. Point charges are fixed to each corner, as shown. The 4.00 C charge experiences a net force due to the charges qA and qB. This net force points vertically downward and has a magnitude of 524 N. Determine the magnitude and algebraic sign of the two charges.

 

Im trying to solve. Please help me. Thanks.

[iNow]

Where are you stuck? What have you done already?

[swansont]

Start with what equation(s) apply, and how you think you should set the problem up.