Coulomb's Law Movies

Click on the link in the first column to download the movie.

Charging the electrophorus The instructor demonstrates how to produce a static charge on the electrophorus.
Charging the hanging sphere The instructor transfers some charge to the hanging sphere.
Performing the experiment The instructor moves a charged sphere toward the hanging sphere.
Force vs distance To use this movie for data collection, it is best to open the movie in QuickTime and advance the movie until the charged sphere on the rod enters the frame, and record the intial position of the sphere. Then, advance the movie a few frames at a time to make measurements of both d and r.

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