A metal sphere hangs from a string and has 4 kg of mass. The sphere has a charge of +2.3 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))?