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An electron starts from rest 22.5 cm from a fixed point charge with Q = -5.00...

An electron starts from rest 22.5 cm from a fixed point charge with Q = -5.00 nC .

Part A: How fast will the electron be moving when it is very far away? Express your answer with the appropriate units.

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Answer #1

Initially the potential energy of the system of charges

U = kQe/r2   (k = 9 x 109 Nm2/C2)

Whe the electron gets far away, all this potential energy gets converted into kinetic energy of the electron

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