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dom192
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Homework Statement
two pith balls are suspended on a wooden dowel and have the same origin point. the two balls are push away from each other and are equally negatively charge. the string have the length L and the two strings form angle (theta).
knowing
Fg= Gm1m2/r^2
Fe= kq1q2/r^2
Homework Equations
using the electrostatic constant k dervie the formula below.
Q= 2Lsin(theta) x square root of [mgtan(theta)/k]
The Attempt at a Solution
i found out that Fe= mgtan(theta) and Fe -Ft is the horizontal component. then i don't know wat to do after.