24. Electric Force & Field; Gauss' Law
Coulomb's Law (Electric Force)
A tiny plastic sphere charged with a net positive charge of +4.0 nC. It's located in the mid-plane of a uniformly charged, 8.0 cm-long plastic rod and is 3.0 cm away from its center. A force of 650 μN repels the sphere from the rod. Determine the rod's accumulated charge.