Teaching Physics with the Physics Suite

Edward F. Redish

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Forces on charges

Two uniformly charged spheres are firmly fastened to and electrically insulated from frictionless pucks on an air table.The charge on sphere 2 is three times the charge on sphere 1. Which force diagram correctly shows the magnitude and direction of the electrostatic forces? Explain your reasoning.

* From E. Mazur, Peer Instruction (Prentice Hall)

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Page last modified February 18, 2006: E31