Problem 22.7: Charge, inertia, and trajectories

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An unknown green charge (with a #1 on it) is shot into a region containing four fixed charges (numbered 2--5), one of which is known to be positive (the red one). You can measure position using a mouse down (position is given in meters and time is given in seconds). Restart.

Determine the signs of the unknown charges. You may consider neutral as a possible answer. Justify your response.

Problem authored by Scott Bonham and modified by Melissa Dancy.

Physlets were developed at Davidson College and converted from Java to JavaScript using the SwingJS system developed at St. Olaf College.

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