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)? Points B, C, and D have to be passed on the way.
                                     

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)? Points B, C, and D have to be passed on the way.

Explanation / Answer

KE = dPE = e*160 V = 1.6E-19*160=2.56E-17 J

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