An insulating sphere of radius R = 0.160 m has uniform charge density p = +7.20 x 10^-9 C/m³. A small object that can be treated as a point charge is released from rest just outside the surface of the sphere. The small object has positive charge q = 3.40 x 10^-6 C. How much work does the electric field of the sphere do on the object as the object moves to a point very far from the sphere?