conservation of energy in electrostatic-mechanical systems
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A small metal sphere, carrying a net charge of q1 = -2.50 micro-Coulombs, is held in a stationary position by insulating supports. A second small metal sphere, with a net charge of q2 = -7.60 micro-Coulombs and mass 1.80 g , is projected toward q1. When the two spheres are 0.800 m apart, q2 is moving toward q1 with a speed 22.0 m/s (see the attachment). Assume that the two spheres can be treated as point charges. You can ignore the force of gravity.
What is the speed of q2 when the spheres are 0.400 m apart?
How close does q2 get to q1?
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the 3-page solution shows how to use conservation of energy in a simple system of two charges.
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