Skills for analyzing processes involving electric force and electric potential energ...

Skills for analyzing processes involving electric force and electric potential energy

A small metal ball with positive charge +q and mass m is attached to a very light string, as shown in Figure P14.42. A larger metal ball with negative charge -Q is securely held on a plastic rod to the ceiling. Write an expression for the magnitude of the force T that the string exerts on the ball. Define any other quantities used in your expression.