Measured experiment data and graph of electrical force vs separation distance and its curve fit. The curve of the graph showed that when the force between two ball increases as distance decreases.
The equation that we use to calculated value of F(electrical). The variable "X" is the distance moved of the hanging ball from its equilibrium point.
Free body diagram of the ball being suspended at an angle and derivation of the equations we used to determine F(electrical). The calculation on the bottom part is using experimental data to calculate the charge of those identical balls(q=4.19E-8 C).
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