# Electric Charge Question

1. Jan 18, 2006

### stuplato

A small plastic ball of mass 6.10 10-3 kg and charge +0.150 µC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.0150 m2. What is the magnitude of the charge on each plate?
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I tried several times and the most reasonable answer I get is .9715 m but wrong... Thanks in advance

2. Jan 18, 2006