# Two small spheres, each having a mass of 20g,

Question:

Two small spheres, each having a mass of $20 \mathrm{~g}$, are suspended from a common point by two insulating strings of length $40 \mathrm{~cm}$ each. The spheres are identically charged and the separation between the balls at equilibrium is found to be $4 \mathrm{~cm}$. Find the charge on each sphere.

Solution: