Suppose that two balls of mass 1.5x10-4kg each carry equal charges and are suspended by identical threads of length 11cm anchored 28cm apart. If each thread makes an angle of 20 degrees with the vertical, what is the charge on each ball?
The Attempt at a Solution
From a free body diagram of one of the masses:
which can be combined to Fe = mgtan20
using the above equation:
using this, I get 6.8x10-8C
can some one point out where I'm going wrong?