1. The problem statement, all variables and given/known data A bob of mass 0.005kg is attached to a pendulum and has a charge of -8.0 uC. The pendulum is 1.0m long and has a periods of 1.2 s when it's puts it in a vertical uniform electric field E. What are the magnitude and direction of E? 2. Relevant equations ∑Fy = qE - mg = ma q is charge E is electric field m is mass g is gravity a is acceleration L is length T is period 3. The attempt at a solution I set up a FBD and this is what I have so far.