(Solved): A large positively charged object with charge \( q_{+}=3.25 \mu \mathrm{C} \) is brought near a ne ...

A large positively charged object with charge \( q_{+}=3.25 \mu \mathrm{C} \) is brought near a negatively charged plastic ball suspended from a string of negligible mass. The suspended ball has a charge of \( q_{-}=-54.3 \mathrm{nC} \) and a mass of \( 13.5 \mathrm{~g} \). What is the angle the string makes with the vertical when the positively charged object is \( 20.5 \mathrm{~cm} \) from the suspended ball? The positively charged object is at the same height as the suspended ball.