What is the strength of an electric field that will balance the weight of a 2.5g plastic sphere that has been charged to -2.9nC ?(adsbygoogle = window.adsbygoogle || []).push({});

I know that F= ma and that E= Kq/r^2 and also that F= Kq1q2/(r^2). I just don't know how to relate an electric field equation using only mass and a charge?

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# Homework Help: Electric Field question?

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