A 2.5-mm-diameter sphere is charged to - 4.5 nC. An
Chapter 21, Problem 75(choose chapter or problem)
A 2.5-mm-diameter sphere is charged to - 4.5 nC. An electronfired directly at the sphere from far away comes to within0.30 mm of the surface of the target before being reflected.a. What was the electron's initial speed?b. At what distance from the surface of the sphere is the electron'sspeed half of its initial value?c. What is the acceleration of the electron at its turning point?
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