Question

Two point masses carry equal charges +q suspended vertically from same point by two masses less and inextensible strings each of length l .if gravity is neglected then at equilibrium 1 what will be the angles btween the thread 2 what will be the electrosatic force btween these masses

Answer 1

180

$\frac{1}{4\pi\epsilon} \frac{q1q2}{4{l}^{2} }$