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UTGirl24
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Homework Statement
A small negatively charged particle (mass m, charge –q) is currently at rest at the surface of a large positively and uniformly charged dielectric sphere (radius R, charge density p). What minimal “Launch velocity” v0 should be given to this particle so that it could leave the attracting “mother” sphere to travel to infinitely remote places? If the radius R of the sphere is increased by a factor of 2 (everything else left the same), how would the minimal launch velocity change?
Homework Equations
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The Attempt at a Solution
Please help!