The figure shows a graph for electric potential versus position along the x -axi

Question

The figure shows a graph for electric potential versus position along the x-axis. An electron is originally at point A, moving in the positive x-direction. How much kinetic energy does it need to have at point A in order to be able to reach point E (with no forces acting on the electron other than those due to the indicated potential)? PointsB, C, and D have to be passed on the way.
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The figure shows a graph for electric potential versus position along the x-axis. An electron is originally at point A, moving in the positive x-direction. How much kinetic energy does it need to have at point A in order to be able to reach point E (with no forces acting on the electron other than those due to the indicated potential)? PointsB, C, and D have to be passed on the way.

Explanation / Answer

has to have at least zero energy at point C

so KE = 160 eV = 160.0*1.6E-19=2.56E-17 J

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