Hi ^^! I was doing my physics homework and had a little trouble doing this one, so I was wondering if anyone could help me out if they had time. It would mean alot, but thanks anyway just for reading this ^_^!! I appreciate it =) 1. The problem statement, all variables and given/known data Two spheres, each having a mass of 50 mg, are suspended from a common point by massless threads 50 cm long. One of the spheres has been given a charge twice that of the other. The strings make an angle of 6 degrees. What are the charges on each of the spheres? What kind of charge is on each sphere (+ or -)? Explain 2. Relevant equations F = kq1q2/r^2 Q = Ne F = ma q_1 = 2q_2 3. The attempt at a solution Well, assuming that the charges are not coming close together, they must be repelling each other. As such, I thought there must be some kind of acceleration... F = 2ma = 2(50 x 10^-6 kg)(9.8 m/s^2) = 9.8 x 10^-4 N In addition, if I use sin6 = x/.5m, I can tell the distance separating the charges is .0523 m. Now that I found the F, I plugged it into the first equation 9.8 x 10^-4 N = (9x10^9)(q_1)(q_2)/(.0523 m^2) (q_1)(q_2) = 2.978 x 10^-16 C 2q_2^2 = 2.978 x 10^-16 C q_2 = 1.22 x 10^-8 C q_1 = 2q_2 q_1 = 2.44 x 10^-8 C As for the kind of charge, I said that it is impossible to tell except that the must both be either positive or negative, not one and the other, because otherwise there would not be a 6* angle separating them.