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## 1 SOLVED:A 2.5 -mm-diameter sphere is charged to -4.5 mathrm{nC}. An electron fired directly at the sphere from far away comes to within 0.30 mathrm{~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’s speed half of its initial value? c. What is the acceleration of the electron at its turning point?

**Author:**numerade.com**Published Date:**10/19/2021**Review:**4.85 (985 vote)**Summary:**b. At what distance from the surface of the sphere is the electron’s speed half of its initial value? c. What is the acceleration of the electron at its**Matching search results:**in this question, we have, uh, 2.5 mm diameter sphere. Charge two for minus 4.5 and a cool, um, electron is, uh, shot directly at it at the Medicis fear. And then, uh, which is one tree? I mean, from the surface of the sphere before being reflected it**Source:**https://www.numerade.com/questions/a-25-mm-diameter-sphere-is-charged-to-45-mathrmnc-an-electron-fired-directly-at-the-sphere-from-fa-2/

## 2 What was the electron’s initial speed?

**Author:**physicsforums.com**Published Date:**11/26/2021**Review:**4.94 (699 vote)**Summary:**a) What was the electron’s initial speed? b) At what distance from the surface of the sphere is the electron’s speed half of its initial value?**Matching search results:**The acceleration back out at .31mm is a little easier.**Source:**https://www.physicsforums.com/threads/what-was-the-electrons-initial-speed.302593/

## 3 A 2.6-mm-diameter sphere is charged to -4.4 nC. An electron fired directly at the sphere from far away comes to within 0.32 mm of the surface of the target before being reflected. a. What was the electron’s initial speed? b. At what distance from the surf | Homework.Study.com

**Author:**homework.study.com**Published Date:**02/22/2022**Review:**4.94 (955 vote)**Summary:**Thus, the distance from the surface of the sphere 0.86mm 0.86 m m . Thus, the electron’s speed at the turning point is 5.30×1018m/s2 5.30 × 10 18 m / s 2**Matching search results:**The energy due to the electron’s motion is equal to the potential energies between the charge’s particle and vice-versa. Due to the motion of the body, kinetic energy is stored in the body, and potential energy is developed due to the charge.**Source:**https://homework.study.com/explanation/a-2-6-mm-diameter-sphere-is-charged-to-4-4-nc-an-electron-fired-directly-at-the-sphere-from-far-away-comes-to-within-0-32-mm-of-the-surface-of-the-target-before-being-reflected-a-what-was-the-electron-s-initial-speed-b-at-what-distance-from-the-surf.html