A small, nonconducting ball of mass 1.4E-6 kg and charge 1.9E-8 C hangs from an insulating thread that makes an angle of 32 degrees with a vertical, uniformly charged nonconducting sheet. Considering the gravitational force on the ball and assuming the sheet extends far vertically and into and out of the page, calculate the surface charge density of the sheet?(adsbygoogle = window.adsbygoogle || []).push({});

So that is the question.

Basically, there is an infinitely long sheet and at some point is a hanging ball of positive charge given that hangs 32 degrees to the right of the sheet.

I'm not sure at all where to start on this question, and do not know which equations to use. Any help would be greatly appreciated. I simply know that there is a gravitational force down on the ball and an electric force pointing right on the ball, due to the electric field.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Surface Charge Density on an infinite sheet

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