Question

I'm sort of confused about what I should be doing on this. If anyone could point me in the right direction? Two metallic spheres, each with a mass of 0.36 g are suspended as pendulums by light strings from a common point. They are given the same electric charge, and the two come to equilibrium when each string is at an angle of 4.8° with the vertical. If the string is 26.9 cm long, what is the magnitude of the charge on each sphere?

Answer 1

you'll have to analyse the forces from the x and y axis.
there are three forces respectively, with the same magnitude.
the tension, the weight, and the electrostatic force.
do you need further help?