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Coulomb’s Law

Experiment #12 from Vernier Video Analysis: Conservation Laws and Forces

Education Level
High School


You most certainly have experienced the interaction between two objects that have acquired an electric charge, whether it was the static cling between clothes or the attraction between your hair and a comb on a dry day. In this experiment, you will make the measurements that will allow you to determine a quantitative relationship between the electrostatic force and the distance between charged objects.


  • Make qualitative observations about the electrical interaction between various charged objects.
  • Use an examination of forces in static equilibrium to determine the magnitude of the electrical force between charged objects.
  • Use video analysis techniques to determine the relationship between the magnitude of the electrical force and the distance between two charged objects.

Sensors and Equipment

This experiment features the following sensors and equipment. Additional equipment may be required.

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This experiment is #12 of Vernier Video Analysis: Conservation Laws and Forces. The experiment in the book includes student instructions as well as instructor information for set up, helpful hints, and sample graphs and data.

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