When the al ball is charged, it will repel from the other al ball. the more charge on the al balls, the more repulsion. when both al balls have the same charge q, find an expression that lets you find the charge q from the measured separation distance r; i. e. a function q(r), which depends on the string length l, the al ball’s mass m, and the separation distance r between the al balls. make sure to have a schematic drawing as well.