1. The problem statement, all variables and given/known data A metal sphere hangs from a string and has 6 kg of mass. The sphere has a charge of +3.7 µC. A uniform electric field is turned on and directed to the right. (a). What is the electric force on the metal sphere if the magnitude of the electric field is 106 N/C? (b). When the sphere reaches equilibrium, what is the angle that the string makes with the vertical axis (assuming the same electric field as part (a))? 2. Relevant equations [tex]F =ma[/tex] and [tex]F = Eq[/tex] 3. The attempt at a solution I worked out (a) and got the force to be 3.7 N, but I don't know how to do part (b)?