1. The problem statement, all variables and given/known data A charged cork ball of mass 1g is suspended on a light string in the presence of a uniform electric field. When E = (3i + 5j) * 10^5 N/C, the ball is in equilibrium at [tex]\theta[/tex] = 37 degrees. Find the charge on the ball and the tension on the string. ==================== |\ |[tex]\theta[/tex]\ | \ | \ / <- uniform electric field, E = (3i + 5j) * 10^5 N/C | \/ | O <- charged cork ball, mass = 1g, q = ? i ^ | | -------> j 2. Relevant equations F(electric) = qE F(grav) = mg(-j) 3. The attempt at a solution I tried using the cosine law with the forces to isolate for [tex]\theta[/tex] a^2 = b^2 + c^2 -2bc * cos([tex]\alpha[/tex]) but it canceled out. Anyways, [tex]\alpha[/tex] = [tex]\theta[/tex] a = F(elec) b = F(grav) c = F(res) = F(elec) + F(grav) Any ideas? Thanks!